Alcohol and a bunch of teenagers

So my mom is hosting this Tattoo/piercing party for my cousin chris this Saturday. There will plenty of grown folks, but also plenty of teenagers. I recommended my mom got some arm-bands or something to indicate that the children were in fact CHILDREN. She started debating with me saying there was no need for all that when there is! If children are sent home drunk off of their ass and the parents see it, and she's hosting, what's gunna happen next? She starts getting angry with me saying we'll have permission slips for tattoos and stuff, but what about the alcohol?! You're going to have alot of people. They could easily sneak through all them grown folks and slide right to the Hennessy. Am I trippin?! Like forreal! I'm sorry I don't want you getting a bad rep or possibly go to jail for this shit! She said I'm doing to much, but little does she know her 16 year old son came in my room the last time she hosted karaoke night drunk af bragging about it and just boasting havin a good ol time. What in de fuck....