Can you get in trouble for getting paid under the table?

I’ve been having this feud with my dads girlfriend. I smoke and she is trying to get me for that but marijuana has been decriminalized in the state of Pennsylvania. She has videos of me from when I was 17 getting in pretty bad fights with my ex. She even said she’ll get him to press chargers.. She kept threatening to call the chief of police and to have them take a hair follicle which I know they couldn’t do that unless they had a reason to but that seems like bull****. I only have one thing on her and it’s the fact that she get Paid 70 dollars each client to paint nails and she has a license for doing nails but it’s under the table. When we were fighting my dad said to scare her by saying I have a video of her doing nails and getting paid. She seem scared but said she can get up to 10,000 dollars in gifts in checks. That seems fishy to me. I feel like that’s a lie but Idk I need you guys to help. I’m gonna move out eventually and maybe I won’t do anything. I just need something to fall back on if she threatens me again. Please please help!!