My daufhtwr told me I was the worst mother in the world and she wished I was dead. I told her that hurt me and that I would always love her. I then basically didn't talk to her for the next.hour and a half before bed. She was obviously upset by it and when she asked me why I explained to her that if I was dead like she wished then she wouldn't have me to talk to. Because she said it in the evening I told her to tuck herself in to bed because if I was dead I would never be able to do it. The next day we sat down and talked about what happens whwn you feel angry etc. and I told her that her words made me feel very sad and let her know I went and kissed her when she was asleep. She has never said anything like it to me since.
I also think that it's too harsh a punishment to ground him for a week...I would go to he museum too. If it is the one day you two get together these.holidays to have fun I wouldn't take it from him.