Aliens Use Sex to Invade Humans Ch. 05-07

Sam then wiggled his finger back and forth and let it slide out slowly to the first knuckle. Pam felt his finger slide out and she instinctively clamped her ass around it again, this time to hold it in place. Sam could feel her anal muscles clench his finger as if she were milking it and nursing it. Sam knew the battle that was going on within her body. The sphincter was designed to push things out not pull them in. Each time Pam relaxed her asshole, Sam pushed his finger in deeper until she clamped around it again. This process continued until he entire finger was buried in Pam's ass.

With his other hand Sam continued to pay attention to the rest of her ass. His hand wandered all over her shapely buttocks massaging and caressing her soft skin. At the same time he continued to slide his finger in and out of Pam's asshole and he enjoyed watching her anal muscles grip his finger each time. Pam's breathing had become labored and she began to rotate her ass in tiny circles as if to get the finger in deeper. Sam was in no rush as this is exactly what he had planned. He wanted Pam to enjoy every moment of the anal sensations. He wanted to work Pam into a state that she would beg him to fuck her ass or her pussy or both. For now though he was content to worship and devour her hot luscious ass.

Sam then lowered his face to her ass and licked her as he probed her with his finger. He took his other hand and reached under her to find her pussy and her clit. As soon as Sam made contact with Pam's hot wet pussy her body trembled as a wave of pleasure passed through her. Sam was very skilled at finding a woman's g-spot and he located Pam's instantly. Between on finger rubbing her g-spot, another diddling her clit and a third finger in her ass, Pam groaned loudly and her body shook with desire. She knew that she was close to her first orgasm.

Sam's two fingers in her pussy matched the rhythm of the finger in her ass Pam could feel all the fingers in her separated only by a thin membrane inside her. Sam pumped his fingers in and out and Pam went wild. Sam could feel her body giving itself over to him. It was his now to do as he wished. Her pussy was dripping wet, her ass clamped tight around his finger and her hips pushed back at him but Sam did not want her to explode just yet.

Sam suddenly removed his fingers from her holes leaving her empty. Pam screamed for him put them back in her, to fill her up again. Her eyes were wide open and she had a wanton look on her face. Her body was begging to be fucked but Sam was in no hurry. He enjoyed this moment and he savored her dilemma. Sam loved doing this to a woman, teasing her and prolonging her climax. He wanted Pam's anticipation to last as long as possible.

Sam then lowered his lips down to her hot ass and planted kisses all over it again. He massaged the smooth white flesh of her ass as he kissed it and Pam cooed. She longed for his fingers to be back in her. Sam moved his mouth directly over her anus and blew on her nether hole. Pam thrust her ass back into Sam's face as if to impale her ass on his tongue. Sam needed no further encouragement and his hands spread her ass open wide so he could probe her asshole. Sam stiffened his tongue like a tiny dick and probed Pam's asshole. He poked his tongue in and out of her ass then he covered her ass completely with his mouth and sucked hard on it. Sam began to lick, nibble and tickle the sensitive rosebud and Pam cried out in passion.

"Are you ready to cum, Pam? Do you want me to make you cum?" Sam teased her.

"Oh God yes, please make me cum, let me cum," Pam screamed back.

It was the first words they had spoken in over an hour. Sam then reached under her again and located her clit. Pam's pussy was sopping wet and Sam knew she was very close to a climax. He played with her puffy pussy lips as she diddled her clit and then he pushed first one, then two and finally three fingers into her pussy. Sam then pulled his mouth off her assed and pushed two fingers from his other hand into Pam's snug asshole. Pam gasped and swallowed hard at the new invasion in her ass but her state of desire and the lubrication facilitated the extra digit.

Sam now had three fingers in her pussy and two in her ass as he picked up the rhythm. The thrusts became deep and hard as he relished with the delight of devouring her ass and pussy with his fingers. Pam responded by pushing her ass back against his hands as she fucked back at them.

"That's it Pam, fuck back, fuck my fingers in your holes," Sam called out to her.

Sam finger fucked her two holes with both hands as Pam pushed back against him. He could feel the small patch of skin separating the three fingers in her pussy from the two in her asshole. Sam was getting carried away and he began to furiously fuck her lovely hungry body with his fingers. Then it happened and Pam exploded. She clamped down on the fingers in her body and her pussy spasmed as a massive orgasm rocked her. Pam screamed out loud with her mind blowing climax. Sam pulled his fingers from her asshole and replaced them with his mouth.

He could feel the hot moisture in Pam's pussy as it coated his fingers. Sam continued to lick her quivering asshole as her first orgasm subsided but hen another orgasm rocked Pam's body. This one seemed even more intense than the first and it caught them both by surprise. Sam kept his mouth on Pam's ass until the second orgasm had passed and she seemed to recover. With one last kiss on her cute little rosebud, Sam lifted himself up and looked at the beautiful Pam. She had her head turned to one side on the pillow with a look of pure lust and gratitude in her eyes.

Sam then stood up and removed all his clothes and for the first time Pam saw his cock and she was intimidated by the size. Sam moved around the bed and removed Pam's clothes so that she was completely naked now. He gently squeezed her big tits and tweaked her hard erect nipples as he complimented her on her figure. Sam had Pam remain in the same position on the bed and then he caressed her curvy ass again.

"I want to fuck you in the ass Pam. Do you want me to fuck your hot ass? I can see that your ass is asking to be fucked."

"Sam, I'm not sure, it's not right," Pam said nervously but she knew she had come this far and Sam would not take no for an answer.

Sam poured more lubricant on her ass and worked it into her asshole. Pam arched her back and pointed her beautiful ass back at him. He coated her asshole with a generous amount of oil and slid his thick finger back in her hole. He took his time preparing her ass relishing every moment. He then coated his entire cock with the oil and placed the head at the entrance to her anus. Sam pushed forward and the thick cock head squeezed into Pam's tight asshole.

Sam withdrew his cock head and then pushed it back in this time causing more pleasure than pain. He pushed until a couple of inches were in her ass. Pam found her self holding her breath and her body was covered in goose bumps. Sam was so thick that her asshole stretched to new dimensions and held his cock in a vice like grip. Sam slowly slid his dick in and out of her each time going a little deeper. Pam pushed back as if she were trying to poop as she knew that would make the penetration easier. Pam's brief pain had subsided and it was replaced with a feeling of fullness.

Pam relaxed a little and then felt more of Sam's cock slide into her asshole. She grunted out loud as she felt fuller and then a wave of pleasure passed through her body. She was convinced that Sam had his whole cock in her now but really he only had about half of his big dick in her. She felt so full so had no idea that he had about another four inches before he was done. Sam kept adding more and more of his cock to her ass. There was discomfort then fullness and then pleasure each time he went deeper. Pam would tense, relax and then enjoy it. This pattern continued until Sam had his whole cock buried in Pam's ass.

Sam reached around and played with her clit as he pounded her ass. Her pussy and asshole were on fire as the big cock reached previously untouched areas in her body. Pam was on the brink of another huge orgasm as Sam methodically fucked her in her tight anus with his sizeable cock. He loved watching his cock slide out of Pam's shapely ass and then plunge back in as his hips slapped against her curvy ass cheeks causing them to jiggle with each thrust. Her orgasm surged within her as he fucked her ass harder and faster.

As Pam came and came her entire body went into spasm. Her pussy convulsed and clamped around Sam's fingers coating them with her cunt juice. Pam's asshole pulsated as Sam drove his big cock in and out of it. Her ass involuntarily squeezed and released his huge member as he fucked it causing him to finally lose it. Sam slid his pecker deep into Pam's rectum as his cock spasmed and sent a thick stream of hot cum into her channel. Sam kept fucking her as load after load was fired into her ass. His cock kept twitching and spurting inside the impaled Pam.

Pam had never felt so full of cum and there was no where for it to go, blocked by Sam's swollen cock buried in her ass. He slowed his pace and eventually stopped allowing his cock to remain buried in Pam's ass. He did not go soft right away and he gently moved his hips pushing cum around in her ass. Some of it trickled out and ran down over her pussy lips. Pam then felt a strange feeling that something was happening to her body. Her tits all of sudden seemed firmer and there was a fire in her pussy.

Sam stopped and slowly withdrew his cock from her loosened asshole. He marveled in the sight of his impressive cock sliding out of Pam's shapely ass. His man seed flowed from her asshole and ran like a river down over her pussy and between her sweet thighs. Sam and Pam stayed in the same position for awhile and he massaged her beautiful ass as she remained on her knees with her ass perched in the air. Sam pushed down lightly on Pam's back causing her to accentuate her ass even more. He loved looking at it and playing with it as she cooed into the pillow. Sam's cock remained hard and looked menacing around Pam's asshole. He was thrilled that he finally fucked her beautiful tight ass. Pam looked magnificent with her just fucked curvy ass in the air. Sam could not resist sticking one of his fingers in her asshole and she just wiggled her bum instinctively.

Pam then rolled over on her back and Sam moved between her legs. Sam slipped his still hard cock into Pam's pussy and they fucked like rabbits. Pam had countless orgasms and Sam ejaculated in her pussy numerous times. Then Sam had to have Pam's ass one more time and she willingly moved back to all fours. Now that the alien possessed both Pam's and Melanie's bodies, Sam would focus on his patients. Pam and Melanie would assist in the seduction of many patients and the alien population would continue to spread.

CHAPTER 07 -- THE ALIEN POPULATION CONTINUES TO GROW

The aliens continued to acquire hosts at a rapid pace and they controlled almost the entire towns where the four astronauts lived. Incest was rampant among families and the high schools and colleges had daily orgies on campus with students and teachers. The space agency was now convinced that the astronauts had returned infected with a strange virus. Carl had been summoned to the space station for tests and he was under quarantine.

The agency director decided to experiment with some human contact and had selected a young man from the agency to interact with Carl. Suspicious that Carl would try to seduce whomever he came in contact with, the director selected a young effeminate looking man known to be gay. The interaction went according to plan as the agency team observed Carl and the young man Roger together.

Roger had expected to conduct an interview with Carl but he had no idea of what Carl was capable of. Roger was putty in Carl's hands and in no time they were both naked in the exam room. Carl guided Roger over to the exam bed and had him kneel down on all fours. Then Carl knelt behind Roger and he began to caress Roger's beautiful ass. Roger's body was delicate, hairless and flawless. As he sawed his fingers in and out of Roger's anus Carl was getting turned on as the alien directed him to bury his cock in the shapely ass. He moved closer to Roger and lined up the head of his cock with Roger's anal opening and began to ease it into to him.

Carl spat on his hand and rubbed his saliva all over his cock which made it very slick. Carl's cock head cleared Roger's sphincter and it slid right in without resistance. Roger's ass chute was warm and tight as Carl went deep into him. If Roger ever felt any pain he never let on that he did. Carl was all the way in Roger's ass and he started a slow fucking motion. Carl continued to pump Roger's ass with deep, long, deliberate thrusts as he caressed the smooth round ass.

Roger asked Carl to fuck him harder and quicker. So Carl picked up the pace and he started pounding Roger's ass faster and faster. Carl's balls started bouncing off of his Roger's balls and Roger was moaning with each thrust of cock. Carl could feel his climax building and he knew that any moment he would shoot his seed in Roger's ass. Carl tried to make it last as long as possible but once Roger started to contract his anal muscles Carl lost it.

Carl fired a barrage of cum into Roger's ass filling it to overflowing. As he continued to fuck Roger, Carl's cum backed up in Roger's rectum and began to ooze out flowing over their balls. Roger used his talented anal muscles to milk Carl's cock and drain it of all his seed. Carl didn't think that his cock would ever be soft again as he remained hard in Roger's tight sheath. Roger's milking action weakened him and Carl collapsed on top of Roger's body.

Roger flattened out on the bed with Carl on top and Carl's cock still in his Roger's ass. Carl rolled off of him and his hard cock slipped from Roger's ass. Roger rolled to his back and spread his legs lifting his knees to his chest. The alien had now entered Roger's body and was in control of the host.

"Fuck me again," Roger begged.

Carl moved between Roger's legs much like he would fuck a woman and lined up his still erect cock with Roger's asshole. Roger was also as hard as a rock and his beautiful cock pointed toward his head. Carl pressed slightly forward and his cock moved into Roger's hot ass again. Roger's ass actually pulled Carl inside and the cock went all the way into Roger's ass as Carl's balls rested on Roger's ass. Roger than gasped in surprise as he felt his body change and he watched his cock grow right in front of his eyes. Roger stared in disbelief at his cock as it grew from his average 6 inches to a thick 9 inches. The agency team also watched in awe as Roger's body changed right in front of them.

"God, that feels so good, fuck me," Roger cried out.

Roger's ass lifted off the bed and Carl's cock was fully embedded in it. Carl pulled back a little and pushed forward. Roger groaned as Carl began to slowly fuck him, each time taking a longer stroke. Carl's cock head would come out to the edge of Roger's asshole before he pushed it back in. Their fucking was making a sucking sound. Each time Carl's balls slammed against his nurse's ass, his body and Roger's ass made a wet slapping sound.

Carl was so fucking hot that he crammed his cock fully into Roger. Roger held Carl's cock and massaged it with his anal muscles; Carl knew he was not going to last very long even though he had already cum. Roger humped up against Carl fucking him back as Carl fucked him. Their room smelled of sex and sweat. Carl reached down to stroke Roger's cock but Roger grabbed his wrist.

"No, I want to cum just from you fucking me," he said and pushed the hand away, "Just keep fucking me."

Carl took slow long strokes in and out of Roger's ass as Roger pushed up into him more and more. Soon Roger took control and just fucked Carl's cock. Carl let Roger fuck him with his ass muscles. Carl's actions became more erratic and his thrusts shorter and more powerful. Roger was grunting as Carl's cock slid in and out of his hot ass. Soon Carl's cock was barely staying in Roger's ass. Then Roger slowed down and let the cock just press against his prostate. Roger announced that he was cumming. Carl felt Roger's cum shoot between their bodies covering their chests and abs and then oozing out around their pubes. Carl slammed his cock into his Roger's loose wet hole and he felt his balls tighten again. Carl pressed deep into him and his seed filled Roger's ass.

"Yes cum in my ass again. Oh I feel it, I feel your hot juice," Roger groaned.

Carl pulled, pushed and cum spurted into Roger making his hole wetter and warmer as Carl's cock easily slid in. Carl continued fucking him until his legs were weak and he stopped cumming. Carl's cock slipped from Roger's ass and remarkably they were both still hard. The agency observed the action between Carl and Roger as the two men seemed insatiable and fucked for hours.

The agency had part of the answer now as it was confirmed that the virus was transmitted by sexual intercourse. Now that they knew how it was spread among humans they had to figure out how to kill the virus. The rest of that day they would put their heads together and try to determine how to deal with the alien virus.

THE SPREAD OF THE ALIENS IS SOLVED

Sam and his assistants, Pam and Melanie had been successful in seducing both men and women and spreading the alien to new hosts. Pam and Melanie had no trouble seducing the male patients who loved fucking the hot women and loved the change in their bodies. The male patients would go home after the doctor's visit and they would fuck their wives, girlfriends and daughters spreading the alien to more and more hosts.

Sam was successful seducing many of the women patients and they loved the change in their bodies. They too would return home and fuck their husbands, boyfriends and sons also spreading the alien population. A few times Sam encountered a gay patient but he had no trouble getting the patients to suck his cock or accept his cock in their asses.

The population was getting fitter and hornier every day. The women were looking beautiful with their firm bodies and perfect shapes. The men were fitter and they were all well endowed and had developed an incredible capacity for sex. The space agency then called Aaron, Sam and Rachel back to headquarters and quarantined them so that they could be observed.

The team studying the issue closely determined that prolonged exposure to the sun might just be the solution so they arranged a test case. Carl was escorted to the beach accompanied by a handsome young man named Fred. As they sat on the beach the alien began to take control and directed Carl to seduce Fred. Carl began to make advances toward Fred who was not gay. Fred tried to avoid the advances but Carl was insistent.

At one point Carl whipped his swim suit down to his knees and his big thick nine inch cock sprung out. Fred moved away but Carl jumped on him, pinned him to the sand and ripped Fred's bathing suit from his body. Fred screamed for help as Carl tried to shove his cock into Fred's ass. However with his anus dry and taut, Carl could not penetrate Fred's asshole. Carl then reached for the suntan lotion to use it to lubricate Fred's asshole but as he did Fred was able to break free.

Fred ran into the ocean as he was an excellent swimmer. Fred's swimsuit fell from his body as the naked Fred dashed into the water. Carl grabbed the lube, kicked off his swim suit and chased after Fred. The onlookers were shocked to see the two naked men running toward the ocean particularly with Carl's big dick bobbing in front of him. Fred had cleared the breakers and was swimming steadily away as Carl hit the water. Carl cleared the breakers and then his body went limp.