"J~James!" Sasha squeaked as her boyfriend buried his face further into her muff, licking and lapping the cum and her own feminine juices as she seemed to cum, or at least have a micro-orgasm as she watched you bottom out in her boyfriend, beginning to fill him with your spunk as his eyes rolled up into his head. His ass was definitively trying to do just that as it practically squeezed onto you like a vicegrip. Even if your knot wasn't swollen, you doubted you'd have been able to pull out of him easily.
Sasha flopped back onto the couch, twitching a bit as James started lapping a bit more slowly at her cunt, her hand reaching down and scratching his ears and petting his head as she said "Oooohh... t~this is sooo hot... mmhm... s~so... h~how'd you get him to let you do that?"