A terrible mess

Sorry in advance for the details, I'll keep them at a minimum. Recently I was at a music festival with two of my female friends. Their parents only allowed them to go on the condition we brought along an adult to watch over them and ensure they didn't get wasted or do anything stupid. My father volunteered, and that was reassuring enough the girls were allowed to go. We shared a tent together. My parents are divorced, and I thought it a good opportunity for us to spend some time together. The festival lasted for two days, and my father had a very buddy like behaviour towards me, trying to cool in a very awkward way and flirting with my friends. He did exactly what he was supposed to prevent, allowing them to drink and taking advantage of them. The first night was bad enough. Everyone got drunk and things were out of control. The second night I got tired early, and went to sleep while the others were out. It took them forvever to get back, and when they did it was completely dark. The girls were very drunk, and I woke up by them giggeling and making alot of noise. There was alot of fumbeling around with clothes and sleeping bags, then silence. My father asked me if I was awake, and I said yes. Then he asked me if I wanted to see something cool, and upon that he lit a glow stick and tied it to a string in the ceiling. The girls were in a very submissive position under the light, and he was kneeling behind them. He wanted me to sit by his side and watch them in their exposed state. I thought the girls were joking, and that they'd hide themselves at any moment, but they were apperantly completely out of it. When I came up he asked me if they were hot, and when I agreed, told me he was going to have sex with them. Soon enough he had his penis out and was poking it against them. He was unable to get an erection at first, and had to mastrubate behind them. When it was ready, he asked them if they had ever done it before. None of them had gone all the way with a boy. He told them he was going to take their virginity, and that once he'd started, he wouldn't stop. They gave their agreement, and so he started putting it in. Both of them had reached the age of consent, but he is much, much older than them, and they were kind of out of it from alcohol. After some level of pain and discomfort, he finally managed to get it in and pulled his penis out to examine them. He found out that one of the hymens had been unhinged and was hanging from a flap, and that the other hymen had simply widened to accomodate him. He wanted me to comment and express my awe, but I couldn't really say a word, and so he just continued. The rest of the night he was holding their hips and thrusting at them, while they were hiding with their faces down at the matress. Due to alcohol he had a hard time finishing, but came in each of them and had oral sex with them in between. It was impossible not to watch, and so it was a relief when he leaned back moaning the last time. At this time iit was already morning, and he slapped them a couple of times and let them go to sleep.

The day after was really awkward. They were sore, embarrassed, and it was quite appearant they regretted the whole thing. They went out to pee, and my father was all buddy like with me, wanting some kind of response. The tent was taken down and everything was packed. On the way home he tried to assure them that such things was more or less normal and bound to happen at festivals, and that it had been too tempting for him once they had given themselves up. He said in a way they were lucky, since being drunk reduced the pain, and it was bound to happen anyway. He made sure to stop at a pharmacy to get them a morning after pill. They got each their hug before being dropped off at their parents, and afterwards he kept joking in the car, being very proud of what he did. Although they had been all passive, it was the best sex he had gotten in a while, and he was more than willing to do the same to other of my friends. It didn't help being reserved, so only when I expressed my anger did he tone it down. He kept repeating the same excuse, when girls get drunk, such things may happen. Well he was the one responsible for getting them drunk in the first place.

A couple of weeks has passed since then, and although I've gotten some distance to the whole thing, it still makes me angry. I can't get over how piggish it was, there's alot of details I could mention. He is an adult male, and took advantage of two teenage girls while they were drunk, and did it in front of his own son, expecting me to be impressed or something. He took advantage of their youth and naivity, and abused their parents trust. They're going to get boyfriends one day, and have to live with the fact that they lost it in a very impersonal and meaningless way, with a man much, much older. Yeah, they had sexual intercourse, but in no way can it be said they were being made love to. They're my friends, and I feel he has kind of tainted them for me. I wonder what his motivation might have been, getting off or trying to impress me or something? And how do I deal with it? Do I pretend it didn't happen to everyone involved, or should I demand an apology from him, both to the girls and myself? In a way I'm so shocked and angry I want him to feel some consequenses, but I'm not sure how I can accomplish that.