Mike's Family - Pandora's Box Ch. 01

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Big Sister Erica Tells Mike He's Adopted. But Is He?
12.4k words
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Part 1 of the 3 part series

Updated 08/27/2023
Created 07/26/2023
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Mike had not seen Erica since she moved abroad to finish her undergraduate degree and, ultimately, law school. After finishing, she took a summer break to spend time with her family back home and figure out her next step.

The timing wasn't perfect, as their Mother and younger sister, Danielle, would be away for the next week on a vacation they had planned far in advance of Erica's return home. It would be an interesting week as Mike and Erica got to spend some time together after being apart for so long....

The doorbell rang. Mike opened the door.

"You don't need to ring the doorbell...just come on in!"

"Uhhm....Mike!?" Erica had a puzzled look on her face.

Mimicking her, Mike said, "Uhh, Erica!?" Smiling.

"Is that really you?"

"Uh -- Yeah!"

"How old are you now!?"

"Twenty."

"Wow...you grew up so much since I last saw you. You were, what...about fifteen when I saw you last?"

"Something like that."

"I can't believe it's you...my brother is all grown up!"

Erica smiled brightly as she stepped across the threshold and gave Mike a big hug.

"Jesus, Mike, where are you working out? You're all muscle."

Mike smiled at the compliment and recognition for all his hard work.

"Yeah, I've been a fitness instructor for a while now while I work through school full-time...just working on transferable credits."

"Oh yeah -- are you looking to switch schools?"

"Yeah, I'm thinking about it. I'm going to do a little road trip with Mom to visit some schools in a couple of weeks...you know how involved she can be."

"I sure do...she's coming with me to visit some of the cities I'm looking at relocating to -- so that should be fun...."

"Right," Mike said sarcastically.

"...but for the next week, you have me all to yourself!"

Erica's smile was radiant. Her unique beauty struck him.

He stepped back and appraised his big sister. He didn't remember her looking so beautiful. When she had left for school abroad, she was unconventionally pretty -- more of an attractive but skinny bookworm. The woman before him was vivacious and unusually pretty, almost to the point he didn't recognize her.

Erica's long black hair had a sheen and luster, very different from the often unkempt and frazzled-looking hair she kept in her high school days. Her big brown eyes complimented her lovely face, and her strong cheekbones gave her a womanly look that accented her soft, delicate features. She was still tall but had filled out impressively.

"Erica...you look...beautiful!"

She blushed and then smiled, beaming. "Now that's how I like to be welcomed home!"

"I got your bags." He said, grabbing everything she had piled at the door, plus what she was carrying.

She followed Mike, impressed he was able to carry everything all at once and so effortlessly.

As she followed him up the stairs to her old room, she couldn't help but notice how his legs, and especially his butt looked. He was sexy!

This was her brother, so she looked away, but her eyes kept gravitating back. It was so weird to see him be so manly.

"I'll let you get your stuff put away...I'm making us lunch if you're hungry." He set down her bags.

"I'm starving! Thank you for carrying everything!'

"No problem at all. I'm here to help however you need me. It's not every day that I get to see my big sister!" He smiled genuinely.

Erica noticed that Mike's fair skin and brown hair were now augmented by a square jaw and a disarmingly attractive smile as he flashed his white teeth. He was so...handsome. Not at all the kid she remembered what seemed a lifetime ago. He was very different from the skinny Ivy League guys she had been around the past six years while she was away overseas, finishing her undergrad and then completing law school.

"Is the pool still in good shape? I missed this house's amenities." Erica said.

"Oh, yeah. We've done some upgrades. You're going to love it. I'll bring your food out there. You might want to bring your swimsuit...if you remember how to swim, that is...."

"Ok, big shot...we'll see if you can keep up now that you're all big and strong!" She smiled warmly.

"Well...on second thought, I'm not sure I'm ready to take on the champ quite yet...but we'll see!" He smiled and winked at her.

"Sounds fun. I'll see you down there in a bit."

Mike closed the door and left Erica while she unpacked. When her clothes were situated, she found her blue bikini and put it on, as well as a swim robe made of a multicolored sheer fabric that complimented the blue color of her bikini.

Walking out of the main sliding glass doorway leading into their private backyard, Erica was floored by how much was added to the setup.

A large tiki but style bar was nestled against the house, and a massive in-ground hot tub was situated between it and their large Olympic-sized pool. Lavish tables with umbrellas and patio furniture separated the bar and hot tub area from the pool. Other fixtures, decorations, and landscaping adorned the massive backyard, all enclosed by a privacy wall that bordered on obnoxious in terms of size and scope.

While their house growing up was not a mansion, it had been a step or two beyond upper-middle class. With the additions that had been added, it crossed into the realm of excess that only the truly wealthy could afford.

"Holy cow, Mikey. This is unreal. How much did this cost!?"

"I don't know the exact figures, but let's just say that Mom has done well with the money she received after Dad passed away."

"I'll say," she gestured with her hands, "this is amazing!"

Erica walked over to one of the lounge chairs near the bar.

Mike brought a platter of snacks he'd prepared and set it next to her.

"Let me fix you a drink. What do you want?"

"How about a margarita?"

"Coming right up!"

Having made drinks, Mike turned on some ambient music that seemed to come from everywhere, adding atmosphere.

He handed a glass to her and said, "To the majestic return of the Queen!" grinning.

They clinked glasses and drank.

Mike was kidding when he referred to his sister as 'the queen.' She did go to school in England for the past six years, but a part of him always thought of her as upscale and refined, even before she left. She had that quality to her as she was intelligent and classy, but now he could add strikingly beautiful to his description.

Although he couldn't see his sister's body completely due to the sheer fabric of her robe, what he did see was impressive. Her long legs were toned and had darkened beyond her already natural olive skin.

"Hey, I'm going to clean the pool...gotta make sure it's perfect like you remember."

"Oh, that would be great. I intend to get in there...I forgot how hot it is out here!"

Mike took off his shirt and grabbed the leaf skimmer, extending the pole into the pool and dragging it along the surface, removing debris.

Erica watched as Mike worked. She couldn't take her eyes off his muscular body as his muscles flexed to push and pull the maintenance equipment.

She had to admit Mike was hot. She had been taken aback by how handsome he had become during her years away from home, but his body was something else entirely. He looked like a guy out of an underwear commercial or on the cover of a fitness magazine.

Having finished, Mike jumped into the pool, resurfacing in the shallow end near where Erica sat in her lounge chair.

"Come in...it's perfect!" Mike wore a grin on his face.

Standing up, Erica removed her robe.

Mike stared, stunned at his sister's body. Her skimpy blue bikini barely concealed her perky c-cup breasts, and her toned abs and long slender limbs made her look like a swimsuit model. The thin fabric of her bikini bottoms outlined her delicate mound and drew Mike's attention irresistibly.

"Stare much?"

Mike snapped out of it.

"Oh...I'm sorry!" his face flushed red.

"I'm just kidding!" Erica laughed, her gorgeous features and bright smile catching Mike off guard.

As she stepped into the pool, Mike splashed her.

"You shit! Don't think you can outswim me now!"

Erica won state for swimming in high school, so Mike knew he couldn't get away, but he tried.

He only made it halfway across the pool before he felt Erica's hands on him.

She wrapped her arms and legs around him, arresting his movement.

Mike stood up, lifting her partially out of the water.

"Hey, no fair!" Erica said.

Faster than she could anticipate, Mike turned around and grabbed her around the waist, lifting her completely out of the water.

Giggling uncontrollably, she said, "Put me down!"

"You asked for it!"

Mike tossed her through the air, making a big splash, where she disappeared.

When she came up, she splashed him from behind.

"No fair," he said, laughing.

After a few more exchanges back and forth, Mike put his hands up. "Truce?"

Erica relented. "Ok, truce."

They were both grinning.

They spent the next hour in the pool, getting caught up and truly enjoying each other's company. It had been a while since Erica had so much fun just hanging out. Her Ivy League friends were more of the intellectual type.

She said, "I'm getting out before I get all wrinkly and water-logged."

As Erica walked up the steps out of the pool, Mike couldn't help but notice her sexy tan butt. For someone so tall and lean, she had a big, sexy ass. He couldn't look away as he watched it sway hypnotically as she returned to the bar.

In the mirror behind the bar, Erica saw Mike checking her out in the reflection. She felt a little thrill at the attention he was giving her. She wasn't one hundred percent sure why -- maybe it was because he was so attractive now - but it was flattering.

Mike got out and went to the bar, where Erica waited, holding two more drinks.

As the late afternoon turned into evening, the string lights came on, and the drinks continued to flow.

"You have got to be kidding me. Your boyfriend has a scholarship for fencing? You really did move into the upper crust of society, leaving us simple folks in the dust....."

"Not so! As you probably heard, I'm back here looking to get a job somewhere in the U.S., hopefully near here. Cambridge was a great school, but I'm not sure living in England is for me."

"Could have fooled me. I always thought you'd stay there and never come back for us mere mortals...so what does your boyfriend think of you moving back?"

"Well, he has another year of school to finish before he can move here with me."

"Wow...a younger man...you are pushing the boundaries into cougar town!"

"Oh my God, Shut up. I am not that old!"

"Well, your birthday is coming up, and you'll be twenty-seven...I don't know!" Mike was smirking.

"When I was your age, I thought anyone approaching thirty was ancient, but you'll see how silly that is soon enough."

"You mean when I'm old like you!?"

"Shut up, and get me another drink!"

Erica couldn't remember the last time she had such a good time. Mike had made her laugh all night.

"So, what about your girlfriend? Or is it girlfriends?" She grinned as she pushed his shoulder, nearly spinning his chair at the bar.

"Oh, I don't have one right now."

"Are you messing with me again?"

"No...seriously."

"How is that possible? I know you're my brother, and don't let it go to your head, but I was shocked to see how you turned out."

"What do you mean!?"

"Oh, shut up, mister fitness instructor!"

Blushing, he said, "Actually, I just haven't had time lately with going to school full time and my work at the gym...but thank you for the vote of confidence!"

He smiled, touching her arm.

She returned the gesture, putting her hand on his forearm.

"Since you've boosted my ego so nicely, I'd like to return the favor."

"Oh, do tell!" Erica said with exaggerated aplomb.

"If you weren't my sister, looking the way you do...woohey!" He smiled with a grin that said he was goofing around.

Mike had meant it as a compliment, but Erica's quick mind formulated a response that made her giggle out loud.

"What," Mike asked.

"Haven't you ever wondered why we all look so different?"

"What do you mean?"

"I mean, if you didn't know us, would you think we're related?"

He thought about it. It was true that Mike looked quite different than his siblings.

Erica had olive skin that tanned easily and delicate facial features like their Mother. She could easily pass for Italian. Although his younger sister had blonde hair and blue eyes, she had similar delicate facial features and darker skin. Mike, on the other hand, was light-skinned and looked more Germanic or Nordic.

"...well, no, I suppose we do look different enough," Mike said.

"...and did you ever think that might be because we're not related by blood?"

"What are you saying, Erica!?"

"Do I have to spell it out?

"Spell what out?"

"...that you were adopted as a baby!"

Stunned, Mike said, "Are you fucking with me...how would I not know this by now!?'

"I'm your big sister, so other than Mom and Dad, I'm the only one who knows...and since Dad is gone, that leaves just me and Mom.

They struggled to get pregnant and decided to adopt when it looked like Dad had an infertility issue, so they adopted a baby. Less than two years later, they got pregnant and had Danielle. You were both so young, and they didn't want anyone feeling less loved, so they swore me to secrecy. You're an adult now....I think you are entitled to know."

She looked serious.

Mike just stared, not knowing how to process what he just heard.

"...So it makes sense why you find me so attractive. It's just natural!" Erica's grin stood on the precipice of laughter.

Erica intended her last line to be her punchline; they should both be laughing. Instead, Mike had a different response.

"I...I had been feeling pretty guilty about that. I know you caught me looking at you. It's just that...well...I can't believe how you've changed. So maybe that attraction is, like you said, natural?"

A thrill ran through Erica's body, hearing Mike's vulnerable admission.

Maybe it was the drinks or maybe just the attention that Mike had been giving her all night, but instead of telling him she made it up, she got up abruptly and jumped in the pool, splashing the deck.

He immediately followed suit and jumped in the water behind her. When she came up for air and looked back at the bar, Mike was nowhere to be seen.

He splashed up out of the water and grabbed Erica around the waist.

"Gotcha!"

She squealed like a little girl.

She pushed away and realized there was no way she was moving if Mike didn't want her to. His muscular body held her in place.

He turned her gently around after she relaxed.

"I want to make absolutely sure you're serious about what you said...about me being adopted?"

"Why? What does it matter?"

Holy shit, Mike thought. She was being evasive and minimizing the situation as though she were protecting his feelings -- it had to be true. Emboldened by what he now believed, he did something completely unexpected.

"If we're not really related, then this wouldn't be as crazy."

"What?"

Mike moved the remaining inches toward his sister's face and pressed his lips to hers.

At first, Erica was in shock, but feeling his strong hands on her hips and his lips pressed against hers, she responded to his kiss.

Mike couldn't believe what he was doing. Propelled by the buzz of alcohol, he half expected Erica to slap him. Instead, his sister's soft mouth moved to explore his lips.

Mike felt her tongue slide inside his mouth and caress and play with his.

Mike had never been big on French kissing, but it felt sexy and intimate to feel her soft tongue wrap around his, moving in rhythm. Jolts of pleasure coursed through him as he felt her bite and suck on his lips.

Naturally graceful in the water, Erica wrapped her legs around Mike's waist, forcing him to respond by reaching below her, grabbing and holding her voluptuous ass, and pulling her tightly against him.

Erica's hands moved through Mike's hair, pulling at him, telegraphing her arousal.

Mike's hard-on pushed against his shorts as he made out passionately with his older sister. Everything seemed to slow down as they explored each other; nobody was willing to come up for air and acknowledge what they were doing was as crazy as it was.

When Mike moved his right hand off his sister's butt and placed it on her soft but firm breast, he felt her nipple harden, and the passion of her kisses increased.

They were devouring each other with a hunger that neither saw coming.

It was with only the faintest call toward sanity that Erica released her legs and hands from Mike and stepped back.

She looked at him, breathing heavily.

"Mike...I don't think we should be doing this...."

"I mean...we shouldn't be...but that was nice, right?"

His smile made her smile too. She was turned on -- she had been into it.

Erica climbed out of the pool and back to the bar. Mike took his time so he could allow the cool water to tame his erection.

Even so, as he walked up the steps towards where Erica sat, she could make out his semi-erect penis filling out his shorts alluringly. His washboard abs and incredible physique only added to the picture. She put her robe on to conceal her hard nipples. Now that she had tasted Mike and exposed her hidden desires, she felt guilty about lying to him and opening this particular can of worms up.

When he reached the bar, he said, "Do you want anything to eat or drink?"

"No...I think I'm going to hit the hay. It's been a long day with all the travel."

"Oh...ok...yeah, totally. You should get some rest."

Erica scurried away. She tried not to be awkward, but she had just been making out passionately with her brother and needed to process that.

Mike put everything away and shut down the bar, as well as the backyard lights.

When he got to his room, he went into his bathroom and jumped in the shower. All he could think about was Erica's beautiful body and the taste of her luscious mouth as she clung to him with her hands and legs.

He felt her attraction to him and wondered if she would be having the same thoughts. She was still his sister, but in light of being adopted, she was a little less his sister in his mind. He was definitely going to find the right time when his Mother got back to confront her about such a big secret. It was understandable not to want your child to feel like they didn't belong, but when he became an adult, that was another story.

For the first time ever, he realized he needed to masturbate thinking about his sister to get some relief after spending the afternoon and evening with her.

His dick throbbed hungrily as he pictured Erica's lean body and that sexy mound that her bikini barely concealed. He pictured pulling them down and rubbing his dick against her pussy. She definitely had to have an incredible pussy. Mike rubbed his dick, fantasizing about her.

It was not long before his big cock unloaded, shooting his pent-up spunk against the shower wall.

Erica lay in her bed, not daring to touch herself. She felt so horny and couldn't believe how turned on she was when Mike kissed her. It was so much more passionate than anything she had felt with her long-standing boyfriend over the past six years.

She felt guilty. Why had she not just told Mike she made up that story about being adopted? Now that he had kissed her, she felt responsible. Yes, they were clearly attracted to each other, but there is no way he would have acted on it if she hadn't created the opening.

She really liked Mike and didn't want to hurt him. As the older sister, she was going to take responsibility and come clean the next day.

* * * * * * *

When Erica got up, something smelled good. She quickly showered and came downstairs into the kitchen.