Me (35m) confronted my (25f) GF of a guy she was flirting at work. She confessed that she had a thing for him but it was only emotional attachment she says. I felt betrayed but at the same time I felt I had an urge to punish her, and she agreed. She told me to fuck her asshole as punishment and so I did.

She thought tho that she was gonna get fucked in her pussy first but I told her that nope, she's gotta take my head first in her ass. She didn't realize I was trying to get it all in, and I'm quite big, she's quite petite.

The first penetration I made sure it went all in, as she gasped and told me to go slow, I told her to breathe in and out to take it. Long story short we fucked for almost 2 hours and made her cum two times, each time triggering her goosebumps all over. She fucking love it. What should I do next ?