Boyfriend dad played a joke.

His parents are very interesting, which shows that they are easy-going people. The atmosphere in his house is very relaxed, which is a good thing. You should also get involved, and you should laugh along with it. If everyone else is laughing, you keep a straight face, and that's it. Don't worry, you have a good smile and let them know that you are easy to get along with. Such parents are easy to get along with. You are very lucky and excellent, many times better than those who focus on finding fault with your daughter-in-law.