NEI I feel like this could go either way but I just feel without knowing more about your mom and these friends, and the entire situation. On one hand, not all people who hang out that are the opposite sex are sleeping together, not is anything wrong with being an adult and having friends of younger ages. I’m in my 30’s and have friends from 19 y/o up to friends in their 50’s and 60’s. Also, Tylonel will not get you high. You could easily be the asshole for being overly protective or just not understanding. On the flip side, you have a genuine concern for your mother and her well being. My advice is to take a step back and try to see from all vantage points before making assumptions.