I took my then girlfriend (now my wife) to an arcade in Seattle's First Avenue. This adult arcade had a couple of rooms which were big enough to have a bench, and we took one of these that were showing an IR loop of a blond taking on 2 BBCs. I purposely left the door unlocked, and soon had my girlfriend stripped to just heels, garters, and hose. The film was hot, so my girlfriend was on her knees giving me a blowjob when the door opened and the black janitor of the arcade joined us. I allowed him to stay, and ordered my submissive girl to continue sucking my cock. He started to maul her tits, pinching and pulling her pink nipples. She was scared, but also excited by the whole nasty scene. He was talking nasty to her, and soon her pulled out a 9" black cock. I pulled her over by her hair and made her suck him to completion. I loved seeing her on her knees, sucking a black janitor's cock. When he finally came, he grabbed her head and held it tight as he shot his load down her throat. The full story can be found in Dark Wanderer, just look up LeatherZebra under author.