Finding out that your teammate's pregnant step-mom was cheating on her husband with your step-dad was one thing...but seeing them go at it was entirely another! I mean, she's always dressed really sexy, kept herself in shape, but you didn't really fantasize about her that way until you saw her, on all fours, saying some really raunchy dirty stuff while she got fully fucked. You couldn't help it, you took some video and its been all you jerk it to lately. You even put some spyware on your step-dad's phone to be able to find out what else they share and do. You're addicted to her horny, pregnant slutty behavior! You admit, you started to think about it--blackmail--pretty early on, but just as a part of the fantasizing, really. You weren't going to do it. Until you realized you had no other choice: she was all you could think about, all you wanted, all that made you cum. And with the way she keeps flaunting her body despite her growing bump, you can tell there's a part of her that loves to be the center of sexual attention, from anyone. So you take advantage of a get together at her house. The whole team is there, but that won't stop you from cornering her in the bedroom, confronting her with all your evidence. I mean, you barely have to even suggest what you want before you can see that gleam in her eye. That horny little slut, this is going to be easier than you thought! You even get her to suggest it: you take your cock out and start to stroke, knowing she won't be able to take her eyes off you, won't be able to deny herself the opportunity to get fucked. You know she's a submissive little slut, she says as much when your step-dad is balls deep in her, and you being his step-son isn't going to stop her from getting what she wants. "Oh, well," she purrs, "with all this evidence...I guess I have no choice but to do...whatever you want, then, do I?" she purrs, barely holding back a smirk as she gets on her knees and starts to expertly suck your throbbing thick cock! You knew it wouldn't be too hard to get her to agree, but she's practically blackmailing herself: "Oh, with all this evidence, you could make me do whatever you want, huh? Take your cock with my hands cuffed, gagging on your dick..." as she does just that. Sometimes sluts like her just need a little permission to go wild, and you're happy to offer it. She sucks and drools all over your dick before climbing onto the bed, spreading her pussy without hesitation, and pistoning her hips up and down your cock like a wanton, cock-hungry whore, only pulling off to squirt all over the bed, your cock, before going right back for more. You'd heard pregnant women can be extra horny but this is next level sluttiness!