Should I have forgave her?

So I was in the passenger seat of my fiancé's car at the drive through window of a restaurant. As we were pulling up I pulled out my wallet and card to give to her to pay for our food. After I gave her my wallet and card, she pulled up her FB to ask me if it was ok for her to accept a friend request from some guy who she claims is gay who she messaged just for door dash convo pertaining to her work as they are in the same fb group. My fiance is in her early 40s and he is in his 20s. So I told her it's cool. I then stated that Im very trusting as I was also ok with her messaging some ex marine who was a door dasher as she said she was just trying to get info from him for mutual dashers as they didn't feel right about him. When that marine fb incident happened, we were in the movie theater (weeks prior). She showed me the convo on her fb DM during the movie. The dm thread went on for about 3 weeks as most of it was about door dash. She did invite him to a door dash holiday party during the dm thread as she told me that was to just see if he was really who he said he was so other dashers could satisfy their curiosity about him. So that night at drive through when I brought back up the marine fb incident (I was speaking calmly) she cut me off and said the word "wallet". I didn't know what she was talking about and thought she was asking me for my wallet again. So I continued our convo about the marine fb incident then suddenly she yelled "where is my wallet!!!" She panicked and thought she left her wallet in a store that we were at earlier (she found it in the car). I then expressed that I didn't like her yelling like that and it started an argument. During that, I kept saying I don't like to be treated like that. She then started repeating me in mockery then flung a tiny piece of paper at me. Her response to that action was "dear God it's just a paper".. Did I do the right thing in forgiving her? I am very busy career wise but still drive and see her every weekend.

Should I have forgave her?
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