<human>: So this week my fiancee and i have had an awkward week, small fights randomly throughout the night, as we don't really see each other during the day and we both come home tired from work and school.

I have a habit of popping / spanking our cats when they do wrong (clawing our legs, biting, swatting their claws at us) and it's become a habit. Last night our cat dug her claws into me (in an attempt to beg for food) and i reacted by tossing her to the couch (we have a large 1 piece couch), and popping her bottom to get her to jump up to her spot on the couch so she'd relax as she usually does

My fiancee hates this, as I've accidentally hurt one of our cats before that we had to take them to the vet.

Anyway, my fiancee reacted by asking me if i would like it if someone hit me, and slapped my shoulder, and arm, and then a full 5 finger slap across the face. I was incredibly angry and emotionally hurt, but i didn't react with anything physical. 

I come from a family where my mother was abused by my father very severely, and I've always been told that hitting your significant other is something you never do, even in anger. It really hurts, my trust in my fiancee is somewhat shaken, i still absolutely love her, but i can't stop thinking about being hit.

She has since apologized profusely, and we have had a long discussion on the entire incident, we've agreed that anyone hitting anyone again is something that can't be tolerated.

I don't know what to think right now. My fiancee has intense problems with anger, but this is the first time she's ever been physical.

I don't know what to do, i can't stop thinking about it and it's really bothering me. I have no intention of leaving my fiancee, we live together and take care of each other, but this incident has shaken me. 

is this normal? Is it normal to keep thinking about it? Will it go away? It's just so bothersome to keep reliving the experience.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: My fianceee hit me out of intense anger and wanted to "show me how it feels to hit" our cat. I can't stop thinking about the incident and being slapped, and i don't know where to go from here.