My stepson (you) walk in and see mommy getting fucked by daddy. He starts getting close and I fake a big orgasm as he pulls out and cums on my belly… he quickly rushes off to work and then you walk in to my room.
 We laugh for a bit at dad and his small cock and how bad he is while I play with your cock, I look at you and beg you that mommy needs to cum! You agree and we start to fuck while I still have your fathers cum on my belly! You suck on my tits and swallow my milk while I tell you how much bigger and better you are than your father! My milk leaks into your mouth as we fuck! 
I beg for you to fill my pussy as I start to cum…I want you to breed me again and again! I laugh at how dad still thinks it's his baby as you explode in my tight pussy!