Theater gangbang

After having gone to glory holes all summer, that fall I saw an ad for an adult theatre about 40 miles away in nearby city. I showed it to my girlfriend, and I asked her if she wanted to go that weekend. She asked me what happened there and I told her that there would be sex movies on a big screen and probably some couples and a lot of single guys. I told her that some guys would move and sit around a couple and if the couple didn't move, the guys would know that the woman was willing to have some type of sex with the guys with her guy's permission. I told my girlfriend that it was usually handjobs and blowjobs and sometimes actual fucking. My girlfriend said that sounded fun. She asked me if I would be okay with her being fucked by other guys. I told her that we would see how things were going and decide then. I didn't want to tell her that I wanted to watch her being fucked. I didn't know if she would go that far since I was the only guy to have fucked her.
We went Saturday evening, and we sat near the back. As our eyes adjusted to the darkness, we saw that we were the only couple and there were five or six guys. We hadn't been there long when a couple of guys moved near us. One guy took the seat on the other side of my girlfriend and the other guy sat behind her. I kissed my girlfriend and asked her if she was okay with the guys touching her. She nodded yes and I pulled her sweater over her head. She was now naked from the waist up since she was braless. The guy beside her kissed her and the guy behind her cupped her breasts in his hands. Soon the guy beside her was kissing her nipples while the other guy still held her breasts. I unzipped her jeans and pulled them down along with her panties. Now she was naked except for her jeans and panties around her ankles and her sandals.
Two more guys moved close to us, and I got up and moved over one seat so that one of the guys could sit beside my girlfriend. The other guy sat in front of her. The guy that had been kissing her moved down and started licking her cunt. He very quickly found her clit and she started moaning. The guy on the other side of her started kissing her and then he moved so that she could suck his cock. There was my girlfriend, one guy licking her clit, another holding on to her breasts and she was sucking off another guy. The guy in front of her reached down and stuck several fingers in her cunt. The guy that was licking her stood up and lowered his pants. Then he got between her legs, and stuck his cock in her cunt.
He guy fucking her didn't last very long before he groaned and came inside her. Then he was replaced by the guy that was behind her. He entered her and soon came. Then the guy that was in front climbed over the seat and took his turn. Finally, the guy that she sucked off moved on top of her and fucked her for several minutes before coming. I thought that we were done since four guys had fucked my girlfriend.
As these guys moved away, four more guys came over. Soon my girlfriend was being fucked by one guy while she sucked another guy off. All four of them fucked her one right after another.
I helped her get dressed again and we left. As we were driving back, I asked her if she had fun. She told me that it was great and asked if we could do it again next weekend.
We went back several more times and each time some of the same guys fucked her along with many more. Evidently, word got around that a cute young blonde girl was up to fucking anyone that wanted to fuck her. My young girlfriend who had only fucked me became a very experienced woman who was fucked by almost