We had a good time, though we broke the bed eventually (literally). I had to come up with some explanation to my wife later. But it was worth it.
It is funny - I just realized - I remember the broken bed but I do not remember who did cum first or second and how. I think she came when he fucked her and also she came several times from riding my face, my tongue in her pussy. I always shave smoothly before any sex. And he came once in my mouth and once into her pussy. I myself probably came to his mouth and may be into her pussy, in condom, but don't remember really.
Later on we had more fun, but more and more he wanted to fuck my ass (and she wanted to watch) and I was not ready for that. Also, she played with my cock too aggressively. I love to be roughed up in other places, my nipples and ass are fair game for pinching and slapping, but my cock does not like dry fast hand-job - it likes more wet sloppy slow oral.
At one point our game ended up indeed as they really trapped me in the bed, now at their home, clearly with a goal to achieve what they want. She was on me, pushed her buttocks on my face and kept my cock with strong grip so that I could not do anything to resist. She had suck the head of my cock sometimes, but mostly rided my face, - while he probed my ass and put finger, then two, and finger-fucked me with lube. It was hot, but again, I was not comfortable with idea of his big cock entering me. We all moaned a lot, I wanted to wiggle out my ass, but she kept my cock. So I grabbed her boobs and started to play roughly. At first she liked it. But then he started to push his cock into my ass. With very first pain in my ass I squeezed her nipples hard, she squeezed my cock hard, we all started to talk dirty like "stop you fucking bitch!", "or I will break your cock!" ... "I will pull out your boobs!" ... "you will have no ass" ... "I will take off your nipples" ... "aaAAAhhh..." ... "oouUUhh..."... He groped and pinched my ass hard but was probably afraid to push cock further. She squeezed my cock and pulled my pubic hair but was also somewhat careful not to apply full force. I bite her ass slightly as a warning and pulled her nipples hard... With all the moaning I suddenly felt great wetness as he had shot his load without even properly entering my ass, just at the entry. And she juiced my face like a flood, and suddenly she pinched my nipple and I shot too.
We had a few more meeting like that. But eventually they emailed me that they are moving on unless I want to be fucked in the ass. At that time I started to play with one interesting lady, and still did not want being fucked in ass with his big cock. So we have parted. I think they had found some guy whom he'd fuck anally. But altogether that was a pleasant experience for beginners... now I am far more uninhibited and I am sure they are too.