My husband and my sister hate each other. I've learned that when they go at it to just stay out of it. They're both pretty immature about their distain for each other. Example. When we saw my sister I told her I had some good news. The news was I was pregnant. But when I told her I had good news she said (while looking at my husband) super excited "That he got diagnosed with a terminal illness and only had 5 months to live!" More recently my sister had to get a hysterectomy because she had cancer. I guess my husband wasn't listening when I told him she got surgery because when I went to see her with my husband he goes "Wait you had surgery?" She said "Yeah dumbass. What do you think all this get well stuff is." He goes "Idk. I assumed you stole it from a terminally I'll child". They both just get on my nerves. On the bright side they don't put me in their arguments. They deal with their beef on their own. They're both just annoying with it.