Going to keep this anonymous for the first post, then I'll say which parent I am after I've got responses.
Parent 1 has a not long turned turned 18 year old DD, she's best friends with a 17 yo boy (parent 2’s child). 17 yo has ADHD which could make him vulnerable, he's allowed to drink a little at parties with his friends but not very often.
The two of them went out to a club, 17 yo was using parent 1’s elder sons ID. Parent 1 knew about this as told elder son how he could get in trouble with someone else using his ID but didn't tell parent 2. The boy told parent 2 he was at a party
Parent 2 found out and isn’t happy
Was parent 1 U?