Title sounds weird but basically whenever we are eating as a family my sisters lip smacking annoys the living shit out if me. She smacks her lips SO LOUD when we’re eating and sometimes it gets to the point where im fuming and pissed at her and myself the whole day. Whenever we are eating together I ask if she can chew more quietly and shes just like ‘oh, thats how I eat’ and she says it in a rude way. It happens very often so when we are eating I just shush her and she gives me a dirty look. AITA?