As a white sissy slave to a black tranny mistress, my duties are quite simple. I must do whatever my mistress commands me to do. She insists that I dress as a girl with satin panties, bra, wig, makeup, etc. Mostly she keeps my sissy clitty locked in chastity, except when she is feeling playful...I live for those moments when she takes off the cage and plays with me. On this particular night we had just settled in in the living room, and we were watching transexual porn videos on the TV. I had just removed my mistress's panties and was starting to lick and suck on her stiff cock when there was a knock at the door. As I was ordered to do, I answered the door to find my mistress's friend Martin. We invited him in. I had met Martin before and I suspected that he was bi. He was white like me but taller and quite well built...very masculine. Martin sat down in the recliner and my mistress restarted the porn video and explained to him that she was right in the middle of being "pleasured" by me when he knocked. To my surprise, Martin said, "Well, don't let me interrupt; by all means go ahead with what you were doing." I quickly resumed my position on my knees in front of my mistress and began to stroke and suck her cock with as much expertise and I could muster. Occasionally l could see Martin out of the corner of my eye, and I noticed that he was rubbing the crotch of his trousers with his hand. My mistress eventually began to moan quite loudly and threw her head back as her orgasm overtook her. I managed to catch most of her delicious cum in my mouth, but a lot of it also splattered on my face. As i began to wipe the love juice from my face with my fingers and then lick them, Martin remarked that that "looked like a lot of fun." To my surprise, my mistress just came right out and asked him if he wanted her slave (me) to do the same for him. I watched as he unbuckled and lowered his trousers and underwear revealing a very nice long (but not huge) prick. He leaned back in the recliner, and I crawled on my knees over to him and began to lick and suck him. His cock tasted delicious. As I continued to work on his cock, he was carrying on a discussion with my mistress. She mentioned that I was an excellent fuck with a hot ass and asked if he would be interested in fucking me. Almost immediately I could feel the beginning of stirrings in my cock cage as my sissy clitty was starting to get excited. Martin replied that he would love to fuck me, and so my mistress ordered me to get the lube from the bathroom. Coming back into the living room, I removed my panties and began to lube my asshole. Then I squirted a good amount in my hand and rubbed in onto Martins' throbbing cock. I bent over the arm of the couch and presented my "pussy" to my master. My legs were actually trembling with anticipation as I felt the tip of his cock start to touch my pink hole. He was very gentle at first....easing it in slowly, but once he was fully inside me, he began to thrust. Overcome with passion, I was thrusting my girly ass back against his prick and squeezing my muscles around it. I knew it was going to happen...because it always does when I am fucked in the ass. I felt a climax building in my loins. and as I humped against him saying "Fuck me harder, fuck me harder," my caged cock began to spurt and the jism from it dribbled out onto the floor. Realizing that I was orgasming on his dick, Martin began to shoot himself, and I felt his cum spurting deep inside me. I was in Heaven. I had been allowed to cum for the first time in over two weeks, and I just kept thanking Martin over and over for "fucking me so good!" I don't know if my mistress will continue to loan me out to her friends, but if there are any more like Martin, I will be more than happy to accommodate them.