And the nerd turned out to be quite good! I thought he was so thoroughly licking her asshole. Turns out he's an anal gourmet. He's been shoving it all the way up her asshole. Apparently this wasn't the first time the lovers had tried it - the bitch didn't even twitch when he came in. She's got an asshole that's big enough for this thing. I'd spank her buttocks to make her swing better. He'd do the right thing with his mouth. Let her get used to being a slut.
When my sister is tied up, with her legs spread apart, even my brother would not refuse to take advantage of her pussy. She'll open her own mouth.