Rough sex can mean a lot of things
We get with a guy we know off and on for mfm fun, we take turns with her and we all have a fun night. There's lots of hard fast fucking especially with him but lots of slow sensual sex fun too.
Our routine is we mess around watching each other do her, I watch him he watches us, we always go twice each then they go downstairs for one more without me in the livingroom without me. I can easily watch from upstairs. One night I looked down and he was pounding her from behind then I realized he was in her butt really going at it. She was grunting like crazy, he let it go back there, he got dresses, they kissed goodbye had he drove off.
She came back up to our bedroom, I told her I was watching and she said it seemed like he went on forever. (I was maybe 4 minutes.) She said it hurt a little but it was hot.