Family Ties/Try your mother this time.
"Mom, I want to fuck you this time," You said, much to your mother's joy and sister's displeasure. "Heather, its only fair." Your sister pouted but nodded her head. You reward her with a kiss that lasted only a second, pulling away with her following you, a whimper escaping her mouth and moved toward your mother.
She spread her legs to reveal the pussy you once came out off, dick throbbing with the need to be inside of her again. You pressed your dick into her, enjoying the feeling of her warm insides before quickly gaining speed, rocking the bed with your thrusts.
Your mom pulls you closer to her and you take the chance to enjoy her chest, taking one nipple into your mouth and another in your hands. You suck as much as of it as you could, teeth biting her tit.
"Yes! Oh god yesFuck me Timmy. Make your mommy your own personal bitch," She moaned and wrapped her legs around you, trying to push you even deeper. You try harder as well, wanting to see how deep you can go. "This is even better than I imagined!" You mentally agreed and proceed to pound her pussy as if your life depended on it.
Out of the corner of your eyes, you see Heather watching and furiously fingering herself with an expression of pure want on her face. Her eyes were begging for you to finish so you could fuck her next.
You keep this up for a while, dick ramming balls deep in your mother's pussy while suckling her tits and your sister fingering herself to a climax right besides in the process.
Soon though, you felt yourself push over the edge and yelled. "Mommy, I'm going to cum!"
"Me too! Do it inside me! I want to feel your cum inside me!" She screamed and hugged you tight against her, balls emptying their payload into her womb. The sight of her brother and mother cumming was enough to make Heather cum as well and the three of you laid exhausted on the bed. Your head rested against your mom's tits but soon you felt yourself harden within her once more.
She shivered in pleasure, feeling your cock grow in her. "You want to go again Timmy?"
"What? No way, its my turn," You saw Heather raise her ass into the air while her head was still pressed against the bed. "You want to mount me Timmy? Like I'm a horny bitch in heat, you can fuck me doggy style." She even wiggled her butt at the end, temping you with how her cheeks jiggled.
Your mind once again wars against itself, trying to decide who to fuck. Your mom who already had your dick inside her or your sister who's ass looks more tempting as the seconds pass.
Or