My partner discovered me performing on webcam and had anal sex as punishment

My partner and I have been dating for a while now and we've always been pretty open about our sexual desires. He's always been very supportive of my decision to perform on webcam. However, the other day he stumbled upon me giving a deepthroat to another guy while I was supposed to be studying. This was a huge breach of trust and as a punishment, my partner decided to teach me a lesson. He came over and we started fucking. At first, it was just some harmless pussy fucking but then he decided to take things up a notch. He wanted to teach me a lesson about what it feels like to get fucked by someone else. So, he took out his big cock and started fucking me anally. It was a rough and painful experience, but I knew I deserved it. In the end, he finished inside me, leaving me feeling used and ashamed.