My kids safety is being threatened, while my sister lives her best life.

My sister, “Lily” (20f) recently dropped out of college due to Covid. She was supposed to get a job after dropping out. She was also supposed to move out. Neither happened. My parents say they don’t want to police her, but honestly, I don’t think my parents give AF about her life. They just don’t want to be bothered. <br>Lily has been careless during Covid. She goes to parties, & hangs out with people who also don’t take Covid seriously. She was caught driving with 2 men who weren’t wearing masks one time. And even comes home from parties at 3 am sometimes. It worries me because I have a rare condition, so Covid would be very severe for me. My brother (17m) is also asthmatic, so Covid could also be bad for him. <br>My parents don’t care. They won’t hold her accountable for anything. She is living her best life, carefree. I’m worried my whole family will be infected by her because of her recklessness. And no one gives AF.