My step sister really wants to fuck, and I tell her yes, but in the ass too, she lets me break it up until she finishes

I'm in my room my sister comes and tells me that she wants to fuck I say yes but I also want to give her in the ass and she lets it, I even put a tail on her so she'd enjoy more, I'm her ass until I get tired and I come inside her, how sweet it is to fuck my sister