"Like, Oh my Gooood!" Megan cried out as she suddenly pulled away from Jeff. Jeff felt a pang of jealous desire but stuffed it as Megan went over to her mom and began rubbing her hand on the top of her mother's gut. "I had, like, no clue you were knocked up. You said half-siblings? Does that mean like…" She trailed off as she worked through what that meant. Slowly, she looked at Jeff with an incredulous grin and pointed at Gloria's belly. "Jeff, were you like-- the one who put brats in my mom?!"
Feeling confident, Jeff simply winked at his step-sister, eliciting another round of vocalized wonder from her. After that however, Megan suddenly pulled her booty shorts down, thong and all, revealing her bare ass to her step-brother.
"Can you like--" Megan began as she grabbed her ass cheeks to spread them, "--pump some into me? Knocking up mom is so hot, and making me the same makes my pussy, like, melt just thinking about it." As she said this, she emphasized her point by raising her cheeks enough to let Jeff see her quivering lips underneath. Already she was dripping with arousal, as a long strand of her pre oozed out and landed in the shorts pooled around her ankles.
"Megan, dear... I don't think that's quite appropriate--" Gloria began as she brought a hand from her swollen form to her daughters shoulder.
"Ugh, mom. Like your one to talk." Megan shot back with a withering gaze, "who made you look like a blimp right now, and don't say it was step-daddy Hank."
Gloria blushed at her daughters comment and backed off, returning her hand to supporting her front-loaded self. Megan nodded in a that's-what-I-thought motion and stepped out of her pooled bottom wear as she sauntered over to Jeff. "Come on step-bro," she said putting her arms back around Jeff, "I've always wanted that mom bod."
"You really want me to pump some brats in you?" Jeff asks, liking the sudden turn of events. He hadn't really thought about it, but filling his step-sister's baby-maker with his baby-batter didn't seem like a bad idea to him. Yeah, he'd have even more to deal with when his dad came home from work, but Jeff was beginning to think of a few ways around that at this point.
"Step-bro, I can't think of anyone better to make me a mommy than the stud who has always been there for me since my mommy got hitched with your daddy." Megan said this as she mashed her lips into Jeff. He kissed back as he solidified his decision to knock his step-sister up. Already naked enough to get started, Megan began fumbling with Jeff's fly as she pushed her tongue into his mouth.
"I'll, um… let you two… bond… in private." Gloria said softly as she slowly shuffled away, careful to maintain her balance as she grabbed her daughter's abandoned clothes and hobbled deeper into the house to give her kids some privacy. Jeff could just barely hear her mumble the word 'blimp' before he focused on the cold air now hitting his rapidly expanding cock as Megan successfully freed it from its denim and cotton prison. She didn't stop there however, completely unbuttoning his pants and continuing to pull until Jeff's underwear and jeans hit the ground in a similar way to her shorts.
Megan then pushed into Jeff, and he once again felt her breasts pressed tightly against him, growing quite fond of the sensation. Keeping up with the familiar feelings, Jeff once again wrapped his hands around his step-sister's ass and pulled her towards him. He perked up a bit as he felt the head of his cock smush into Megan's outer labia. She moaned into his mouth and began to twist her tongue around his, clearly ready to keep going. Happy to oblige, Jeff pushed his hips forward.
He felt her slicked opening smoothly glide around his cock before getting caught on the edges of his bell-end. Megan gripped like she was trying to pull her step-brother further into her. His tongue was beginning to tire from dancing with hers so he decided to oblige even further, pulling away from her mouth to briefly tell her to brace herself.
"Like, for what--" is all Megan managed to say before Jeff scooped into her ass and lifted her into the air. She yelped as he immediately slammed her back down into his crotch, now completely carrying her as he buried himself inside her folds. Megan cried out as she eagerly began humping into Jeff. He raised and lowered her in the same rhythm, both half-siblings making loud grunting sounds of earnest sex. Their bare lower halves slapped audibly into the empty front entrance area of the household. If Gloria could hear her children making love, she did not make it known.
In her bobbing up and down, Megan wrapped her legs around Jeff, and as he put his chin on her shoulder, he couldn't help but grin at how similar she behaved to her mother. Her timing was just as on point as well, the boiling white hot feeling of orgasm beginning to flood Jeff's groin.
"Megan, I'm-- I'm…" Jeff began but stopped as he felt his step-sister squeeze with her legs around his waste.
"Fill me step-bro!" Megan cried out, clearly on the cusp of her own climax as her head leaned against his on her shoulder. Jeff needed no coaxing as he bucked heavily into her, the tip of his head finding the entrance to her womb just in time for him to unleash a torrent of his seed directly into where it would be the most potent. She squeezed him for everything he was worth, her head pushing him into her shoulder while her inner walls milked his head for as much as her inner most depths could receive.
Finally, after what felt like an eternity to both of them, Megan's legs slackened and she began using her arms to hold on to Jeff rather than her legs as his grip slackened and both siblings looked at each other, panting heavily into each other's face.
What does Jeff do now holding his sister while they're both still in the foyer?