I have this and didn't know it or that is was a thing

My wife chews so loud I want to strangle her. I don't of course but have to concentrate my way through it and most times have to tell her which makes her mad. We travelled to my brother in laws and for 4 days he slurps his coffee and food. He ate an apple at the table and i quietly was wishing he would choke. I love them both but the rage starts coming up and i hate it. Guess theres nothing i can do.