Have her strip for you

"Why don't we start by you giving me a little show. Show me what you've got on under that dress."

To her credit, Emma doesn't bat an eye and actually smiles at you, figuring if she has to do this, she might as well enjoy it. She's always thought you were pretty cute, and if this were happening under different circumstances, she'd probably be dripping wet giving a little strip-tease to her stepson. Pulling up the bottom of her dress, she gives you a view of her shear, black panties, lifting her dress just above her hips.

"Is this what you want to see you little pervert? Your stepmom's panties?"

"Oh, I want to see a lot more than that, but yeah, that's a good start." you reply, pulling your dick free from your pants and slowly stroking it to the site in front of you.

Her eyes reflexively fall to your crotch and a look of surprise crosses her face as she takes in the size of your member. Continuing to strip out of her clothes, she slips her arms out through the straps of the dress but holds it up against her chest, concealing her breasts from you, but failing to notice her nipples peaking out the top. "Don't you feel the least bit guilty blackmailing your father's wife for sex?" she asks you, though the conviction in her voice appears to be rapidly dwindling, replaced by a hint of desire, and her eyes haven't left your cock.

"Enough stalling, Emma. Why don't you take the rest of those clothes off so I can get a good view of that hot little body of yours." As she shimmies out of the dress, exposing her ample breasts you continue talking to her. "God, you're so fuckin hot, but you know that, don't you? I see the skimpy outfits you wear, showing off that body; you love men checking you out, wishing they could fuck you. You're usually the one that gets to decide who fucks you, but not today." The authority in your voice starts to make her wet and she starts to get into the little show she's putting on for you. Watching you stroking your manhood in front of her, thinking about what it will feel like inside her, and wondering just what you're planning on doing to her, all add to the excitement of the moment. Bending over at the waist, she slowly peels her panties down her long, shapely legs, and when they reach her ankles, she then kicks them off her feet, so that she stands completely naked in front of you.

"How's this?" she asks you, pushing her breasts up and together for you, her icy demeanor disappeared. "Are you happy now that you can see my tits and pussy!?"

"That's a good start. A very good start, but I hope you didn't think I would be happy just to see your tits and pussy?" you say, getting up from your seat and walking towards the bedroom. "C'mon. We're gonna have some fun. I promise."