The moaning had finally stopped. She wasn’t sure what had gotten into her mother and stepdad, but apparently they were having some of the best sex ever. Allison was pretty sure it had something to do with the bottle of pills with her mom’s purse on the counter. And when she heard her screaming about how his “big fat cock was filling her so good” well, suddenly her stepdad was a lot more interesting. So she had popped two of the pills and waited, eager to get a little bit of what she was getting.
Sitting there she felt her shirt starting to get tight. Shorts too. Looking down she watched as her breasts started to swell, as did her ass and thighs. She bit her lip, trying not to moan as she heard the footsteps coming downstairs.
To her surprise, what came around the corner was not her decidedly average stepdad, but her slightly above average, and completely naked stepbrother, sporting a very much above average cock.
“Alli? You took some of your Mom’s booster pills, didn’t you.”
“Is…that what the bottle is?” She was having a hard time focusing on anything but the hard cock in front of her and the feeling that her clothes were about ready to burst.
“Yeah. She was going to surprise my dad with a little fun, but he’s working late again allegedly. She popped a few and when he didn’t show, I came home to give her the kind of fucking your probably craving right now too.”. She nodded as her shirt began to tear and her bra snapped. He reached over and grabbed the bottle of pills and a sports drink from the fridge.
“Well, I finally wore her out after three hours, but seeing you like this I’m eager to see how you stack up on two conditions.”
“Good. Your mom took two pills. How many did you take?”
“Take two more. I want to see what a double dose will do to you. Don’t worry, I’m going to take two more as well.”. He followed her gaze down to his cock. “It might surprise you, but I was already above average. I grew a bit, but the real boost was to how long I can go and how much I cum. I mean, tour Mom’s tits are even bigger than yours, but I covers her pretty good. And I plan on filling you up, just like I did to her. And then, when she wakes up, I want you two to spend some quality time together so I can recuperate before we have a nice threesome.”
As her shorts split, leaving her hourglass curves on full display, Allison nodded and took the two pills he handed her. “Anything you want, as long as you make me scream like she did.”
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