I found my female cousins sisters porn and burnt it

This is a throwaway as I hope anyone who knows me isn’t on Reddit. I am a 16 (m) and I have a 19(f) cousin that I haven’t seen in a couple of years. I just recently got a switch and ordered some stuff from a second hand game store and I got my game and console but then I had some stuff left over in the box so I thought it was trash but it turned out to be dildos and vibrators and a porn magazine. It then hit me that my cousin owned the place I bought the switch from so I assumed it was hers so I left a note with my number and address on it and it was my cousin and she was pissed that I got her stuff so she demanded I give it back and I didn’t want to since it was “gross” so after weeks of arguing she threatened to tell my parents so I agreed to give it to her and she said she would be there in 30 so I lit the items on fire with some lighter fluid and once it was a small flame I shut my door and then she came over and asked where her stuff was and when I told her I burnt it she got mad but I told her it was gross so she left but it’s been a couple of days and I haven’t heard from her but I know she told my aunt because she’s her mom and she texted me and said we’re going to talk tomorrow and that I’m in big trouble.