Am I a bad person for jerking off on my brothers car?

I know that sounds crazy and all but let me explain. So for starters I have this fetish thing where I like kissing and licking glass and stuff.

One day my brother made me so mad and frustrated and then later that night he left with his friends. I then went into the garage to grab something to drink and then a thought went into my head. Nobody else was home.

For some background, he really loves his car a lot. So I decided to take the opportunity and I jump on his car (super nice frs) and I just making out with the car windshield. I started to masterbait on the glass and then i finished after like 15 minutes. So yes i came on the glass and then after a rush of guilt kicked in.

I started to feel like shit after word but the main reason I did this was to get back at him but also to because I was in the mood. I cleaned up as much as could then I went into the house and he never found out. Am I a bad person for doing this?