Monday Mayhem Day 06

Sean's head was spinning from the alcohol, and he was carried along by his sister's lust. Shannon knew all the best places to touch and best ways to stroke her own body, the unconscious skill destroying any defenses and inhibitions Sean might have had. Even Adam could not turn her body on like she herself could when using her brother's strong hands.

"I want to feel his fingers on my clit." She whispered while kissing Sean's cleavage. Her right hand slipped under the panties to rub and circle that most sensitive area.

Sean arched his back and his breasts thrust into Shannon's face. She sucked the nipples greedily, and he grabbed the rampant cock he had lived with for 17 years, pumping it with both hands. Shannon slid his panties down and they were both naked as the day they were born together.

"Are you sure?" Sean whispered.

"No...yes," Shannon replied. "Maybe this will help, maybe it won't, but I feel like we have to try."

She gently slid the tip of her dick between the moist labia. Her recent experience with Misty served her well. She knew and could feel that the tight vagina had never admitted such a large cock. She pushed forward with gentle pressure until the tip was inside, stretching the lips as Sean moaned.

"Come to me, virgin girl," Shannon whispered.

Sean grabbed her hips and pulled, making the thick penis slide further inside him. It hurt a bit at first, but that was quickly supplanted by feelings of fullness and friction and warmth and pressure mixed deliciously together. The penetration made Sean realize there was this tremendously different pleasure he had been missing out on in his other encounters during the switch.

Both twins pushed and her cock sank further in, inch by inch, pushing forward and outward against the tight resistance. Sean instinctively twisted his hips from side to side, creating even more friction. The feeling was incredible, making both twins cry out repeatedly in unison.

Shannon was finally all the way to the hilt. She felt whole for the first time all week, as did he. They kissed again with their eyes open and hands caressing while their lower bodies stayed locked together. Then they began to move, slowly at first with small back and forth motions, then faster and further.

Sean's pussy ruled him as the cock finally moved its full length back and forth within his tight channel. Wordless sounds were forced from his mouth by each thrust. This was amazing.

Shannon felt the same pressure and friction on her penis as she had with Misty. Her dick felt wonderful as the sheath stimulated it.

Sean tilted his hips in concert with her thrusts, legs bent and back arched. Shannon's tight buttocks clenched and all the muscles on her body stood out like cables as she fucked him hard. Sean lifted their hips completely off the couch, moaning loudly with each long thrust.

"Almost there," Shannon gasped, and he nodded.

"I love you."

They kissed hard, tongues thrusting together as their bodies moved in the oldest dance. Shannon felt the strong legs she had trained squeeze her hips hard. They came simultaneously, both feeling his vaginal muscles clench hard while her penis pulsed, over and over. Shannon groaned into Sean's mouth as Sean scratched her back with sharp nails.

The only thing that kept him from passing out from the pleasure was Shannon's hot breath pumping into his mouth. Both twins hugged each other for a long time, trembling, the sweat drying on their bodies.

Sean finally moved out from under his sister to lie beside her. He laid his head on the well-muscled chest he had worked on so long and felt Shannon's heart still beating hard.

"Did we really just do that?"

"Yes, and it felt so good."

"I know, I was somehow feeling things from both sides, or maybe I was imagining that."

"No, I felt that, too. It made me wonder if the switch is not permanent after all."

They both crossed their fingers as they thought about being back in their own bodies.

"I'm sorry about..."

"What?"

"Anything I've ever done to hurt or push you away over the years."

"If this switch never ends, I guess I'm glad you have my body."

"Yours is starting to feel like home, too."

They fell asleep.