There was a rush of air into my bowels and as one would expect after filling my rectum it had to escape from there. My stomach swell to twice it's siz..., my bowels cramped at with the air being pumped into my guts. As I expelled the air from my bowels it was soon replaced by a very warm slick solution that also filled my bowels and guts. Panicking I tried to release my self from my restraints, it than that I realized that I was also gagged. Well I wasn't truly gagged, there was an "O" ring. "I can cum pretty quick so watch close. This one's for you!"She reached behind her so that she was almost sat on her left hand as her fingers gently pressed against her ass hole before disappearing inside her. The fingers of her other hand almost a blur as she rubbed her clit. She shifted her weight as 2 fingers slid effortlessly inside her before starting to jackhammer her pussy with her hand. Her stomach muscles visibly tightened as she started to cum.She pulled her fingers out before again. I forgot that I had it on."Right after that Lisa said, "I have to get going." and rushed the call to an end.When I hung up the phone I sat staring out the window. I had a knot in my stomach. I had no reason to believe that Lisa would lie to me but that voice didn't sound like it came from the television. I hadn't heard any sound in the background before I heard the door open and closed and I heard nothing after the man's voice. Could Lisa have had a man in our apartment. I picked up the phone. For some reason my cock wouldn't come out of her as I spewed cum against her womb. I was still struggling as I tried to pull my cock out but it felt like the base of my cock was to big and had gotten stuck. After almost ten minutes, I finally tried to pull back from the girl and felt a little resistance before I was suddenly free.I went to my knees and looked at my cock to see a knot like a dogs at the base of my dick. The girl was smiling up at me, her legs still spread wide and cum leaking.