Father's Day was a mess

I finally agreed to let the whole babysitting thing go since everyone said I was wrong for this. But father's day was still a mess. I made shimp scampi for father's day and my step son pushed it away and didn't eat any of it. After a while he said to his dad "Why are you making me come here. You know I don't want to be here." He starts saying hes sorry for leaving and he really wants to make things right and hes trying and his son said "I didn't ask you to try. I was fine with it being just me and my mom. You've been gone for like 8 years." My husband apologized again and said we are family and he said "My mom is my family. You left and married a women who's either trying to kill me or doesn't give a damn to listen to anything my mom told her." I said "Excuse me. What's that supposed to mean." He pulled out an epi pen and said "I'm allergic to shell fish and I was there when she told you that." Then he took his shrimp scampi and through it away. After that him and my husband argued for a solid hour until his mom picked him up. My husband just needs to give up. This kid wants nothing to do with him or us.

Edit: I didn't try to kill him. Just forgot. Jesus