Pregnant BBW Stepsis Gets Her Birthday Present

She’s huge, belly all swollen and stretched out, nine months gone and carrying a full load. Tits that size on a pregnant woman feel impossible. My step-sister. And it’s my eighteenth birthday. I catch her coming out of the shower, towel barely hanging on those massive tits, drops rolling down her belly. She smirks when she sees my eyes go straight to them. "You like this?" she says. "Want your real present now?" No talking after that. I shove her up on the bed on all fours, belly hanging heavy, that fat ass spread wide. Tits swing, smacking together each time I drive in. She’s wet like she’s been waiting all day, and when I grab handfuls of tit they spill right over my grip. So heavy, full, almost hot. Every thrust shoves her forward and she grunts, tits slapping. The stretch marks on her belly shake. I bury myself to the hilt and grind deep, watching her cunt pull at me every time I pull back. Her moans get loud, messy. One hand under that gut for support, the other pushing back against me like she wants it harder. Slap. Slap. Her belly swings. Tits bounce off her knees. I unload inside her while those monster tits shake with every spasm.