Self bondage gone wrong Fat ass Face sitting

Description: Feeling very kinky tonight i have self bondage on the cards. i put on my leather trousers and body harness, then tie up my ankles with a rope, put a ball gag in my mouth and a blind fold to cover my eyes. my hands get handcuffed to a rope connected to the bed like my feet and i am secured in position unable to move. i kinda did too good of a job as i cannot get myself free. my roommate thinks this is a great opportunity to mess with me and walks in, pulls down his leather trousers and begins to sit on my face. how long will he keep me like this?