You're a friend of my girlfriend's staying over. You didn't think anyone was home so you take a bubble bath. You're in the tub playing with yourself, softly moaning. Curiously I peek inside and watch for a few before you realize I'm there, but instead of angry, you're playful and flirty, telling me not to be shy and if I'm enjoying the show. Then you tell me to pull my cock out as you've heard her tell you stories and you invite me to stroke along as you keep playing. Then you get too turned on and either jump out of the tub or pull me in (whichever would be easier to film!) and then seduce me. Some light domination/sexual aggression would be wonderful, more along the lines of taking what you want and enjoying me rather than humiliation. You have me lay back as you suck my cock for a bit before climbing on top of me and sensually dominating me, riding and grinding me til you make me to cum inside you moaning all the while. Afterwards you smile and say you'll have to stay over more often and maybe invite her to join next time.