My step sister, Evie Rees, gets revenge on me after I blackmailed her in our last video. She sent me a video last night that got into my head - now, certain words she says make me do things even if I don't want to! If she says "green light" I have to start edging, and if she says "red light" I have to stop. If she says "shush" I can't talk until she says "speak." Later, I find out that she has certain trigger words to make me cum and pee. The video starts with me edging on a video call. Evie makes me chug down water so that I have to pee, and make a bunch embarrassing noises and gestures. She makes me edge until I'm begging to cum. She has a trigger word that makes me cum instantly, and it's so embarrassing! Every time I cum, I have to yell out how many orgasms I've had today. She makes me cum over and over, until I'm begging to stop. Then she reveals that I'm only allowed to pee if she gives me permission. So, she's sent me a package of diapers to wear. I put one on and she finally lets me pee - in the diaper! That's so embarrassing!