Rachel is what you'd call a controllist.

[He whines, sinking his teeth into the curve of muscle and skin between her neck and shoulder, and worrying at the skin with his teeth until a dark crescent bruise begins to rise there. His fingers slide between her thighs, stroking where his cock pushes in and out of her body, feeling her slickness dripping down his own length. He even strokes wet fingertips over her puckered opening, giving a hard thrust of his hips at the same time just to see what she'll do.] You wanna call her up, sometime? Invite her over? Tell her you wanna get her naked and watch while I fuck her, touch yourself while I do it? I wanna watch her fuck you, baby. You think that would be so fucking hot, baby? [He breathes in her ear.] If she was here right now? Right in front of you, going down on you when I was fucking you? You'd come so fucking fast. She'd love your tits, baby. She'd make you come. I wanna watch her make you come. I can fuck you and she can suck them.