Tbh, my sister's first game night was a disaster but now she's one of us
Honestly, I've been wanting her to join our board game sessions for ages. She finally caved and we played a simple word game, but she kept mixing up the rules and arguing with the referee. Ngl, it was chaotic but everyone had a blast. She's already planning our next game night.
Welcome to the club, where the first rule of game night is arguing about the rules. Sounds like your sister passed the initiation test with flying colors. Honestly, if you aren't causing a little chaos and questioning the ref's life choices, are you even really playing? She's a natural. Next step is her making up her own house rules just to win.
Mixing up the rules and arguing with the ref is just part of the process... my cousin did the same thing her first time and now she's the most competitive one at the table. It's all part of the fun.