Cheating With Your GF's Bimbo Fake Tit Step-Sister

Isla your girlfriend is chatting with her BF, tells him how her step-sister Roxy has just had a boobjob since he last saw her. She's coming round to visit so Isla warns him to not act so shocked when you see how different she looks as she'll probably be self conscious after just having some work done. Don't make it awkward or anything, girlfriend then teases the BF with her own big naturals saying how everyone can't be blessed like her with big naturals. She teases him in her low cut top, squishes her huge naturals together and letting them spill out so he can fondle her tits and bragging about how soft and good her naturals feel.
Girlfriend leaves to do something and Roxy her step-sister walks in to see you. She chats with him all a bit innocent to start with. Of course she brings up her new assets and would like to get his opinion. Do you think the surgeon did a good job I reckon so looking down at her own big chest. Soon realises he's staring at her big tits & she starts to like the extra attention he's giving her & tempts him further. Leaning in closer, pulling up her top to show them off and he reaches out to fondle her big fake tits. Your girlfriend Isla comes back and catches you with her step-sister in the act. She shouts at her step-sister insulting her why were you just topless and you shoving your big fake plastic tits in his face like anyone wants to see those ridiculous things. Do you really think he's into that look? Roxy claims she's just jealous cause hers are bigger now and that her boyfriends prefers them, it turns into a row match between the step-sisters with constant name calling as they compete for you. Isla calling here fake plastic tits bolts on and Roxy calling hers saggy. They both suck your dick claiming to have better tits it's natural vs fake as they fight against each other and you cum all over Roxy's fake tits and your girlfriend is so annoyed at you and her bitch bimbo step-sister.