Jeez, that sounds rough. I mean, it's all roleplaying! If Brian's character objected to Evelyn going for the stabby-stabby of her own accord, that could have made for a good meaty roleplaying situation instead of having an out of game outburst about it :/

I hope they manage to sort it out. It's not fun to be stressed out about something that's meant to be a good time. But how fun that you play with your dad! :)