BDSM initiation. My stepbrother uses me as a slut, shoves a plug in my ass, dominates me and fucks me, I'm a submissive stepsister

While my husband works I go to a hotel with my stepbrother, he does my initiation into BDSM, I have always been a submissive girl and an accommodating stepsister; My dream is to be a compliant slave to a domineering master