Your futa sister is fucking you in the ass. This has been going on for awhile now, the two of you, brother and sister, fucking like this. And each time she fucks you it feels better than the time before. You take her cock so well now. You absolutely love the way it feels. As your sister keeps on pounding into your ass you can't help yourself. It just feels too good and you cum, shooting out a huge load while your asshole tightens up even more around her cock. Even though you have cum, your sister has not. And now, she wants to feel your warm mouth around her cock. So, you eagerly turn around and begin sucking her just the way you know she loves it. It doesn't take long before she is cumming. And it is a giant load that explodes out of her cock. When she is done having her earth shaking orgasm her dick is still hard! You know your sister is insatiable, but it still amazes you how hard you, her brother, can make her. It's then that she brings up trying out something new. She wants you to fuck her in the ass. You're surprised, this whole time she has always been the one fucking you. But now, it's going to be your turn. "After all" your sister states, "it looks like you enjoy getting fucked so much, I want to try it". Your sister lays down on her back. She talks about how sexy you are, and how hot it is to be doing this. It's so naughty, so wrong, yet so right. A brother and a sister fucking like this. Especially when the sister has a dick. You take your hard dick and start rimming around her tight, puckered asshole before you slowly start entering her. You can tell she is absolutely loving having her ass stretched out. And you are loving doing it. You are also loving watching her beneath you, stroking her cock as you begin sliding in and out of her. After pounding into her for awhile, your sister can no longer hold in all her pleasure and she cums all over herself. Her orgasm so powerful that her cum flies up and even gets on her chest. And yet, she remains hard even after all that. You pound into her even harder, more turned on than ever before at the sight of her now covered in her own cum. She has one last huge load inside of her balls, just ready to come out. And when it does, she wants you to cum along with her. Cum deep inside of her tight asshole. And once the two of you are finished, you'll be able to get a nice, close up look at her body, glistening with her own cum.