Two nights ago I think I was very close to getting my wife to pee on me while she was sitting on me riding me. She didn't want to make a mess in the bed, but we were on my side and we do have a matress protector that is always on the bed (small children occasionally join us in bed in the night). I kept the pressure on her, describing how I wanted to feel her fliuds running down the sides of my belly and between my legs, feel the hot wetness soaking the sheet under me and spreading under my ass and up my back.