Health Club Captive

A black friend told me to meet him at his health club at 10:30 one night. I was to come dressed in male clothing except for pink panties. I met him outside the club and he took me in as his guest. Since it was late, the club was pretty much deserted except for the cleaning crew. In the locker room he had me undress, lock myself in a chastity and give him the key. He ripped a large towel into strips and used one to tie my hands behind me. He shoved my clothes in a locker and locked it, keeping the key. He made me watch as he changed into his gym shorts and a t-shirt. He led me into the steam room, bringing the ripped up towel strips with him and made me kneel. He lowered his shorts and freed his cock. I immediately took him into my mouth. I sucked him until he grabbed my head and shot his load into my mouth. After he wiped his cock off on my cheek and pulled up his shorts, he tied a knot in the middle of one of the towel strips. He put the knot in my mouth and tied the towel behind my head. Then he wrapped the ends of the towel around my head again pushing the knot deeper into my mouth and tied it beneath my left ear. He crossed my ankles and tied them, then left locking the door. I sat helpless, sweating in the steam room while he did his workout. While I was waiting I heard someone try the door, apparently the cleaning crew. Even if I hadn't been gagged, I would not have called for help as I was scared of being found bound naked in a chastity. When he returned from his workout, he made me kneel over a bench in the room and put his cock to my rosebud. I cried into the gag as he entered me. He fucked me hard until I felt him shudder and fill me with his cum. He untied my ankles and led me back out to our lockers. I watched naked and bound as he dressed. Finally, he told me that he would untie me and give me my clothes if I would kneel and beg to suck his cock right there. If not he would tie my ankles again and leave me to be found in the morning. I knelt and as best as I could gagged, begged to suck his cock. He untied my gag and I begged him again. He unzipped and took out his cock which I took into my mouth. I sucked him tasting my asshole and his cum. He took a long time, but finally filled my mouth with his cum. He wiped his cock off on my cheek again then untied my hands and opened my locker. He made me pause wearing just my pink panties while he took a pic with his phone. I asked him about the chastity and he told me I could keep it for a couple of weeks. After I dressed we left together, his cum leaking out of my ass and wetting my panties and my face marked with dried cum.