My sister 17 is insufferable at the moment. I don't live with her but she visits with my dad as she did last night.
She's generally rude,moody, selfish standard teenage stuff but there's one thing I can't stand and it's that she keeps telling my young children 8 and 3 to shut up and tells them they're stupid.
I do pick up on this and say don't talk to my kids like that. But WIBU next time to come down hard and say listen to me, talk to my children like that again and I won't have you in my house and spend time with you.
I'm really pissed off about it but not sure how much leeway I should give due to her age