Why my mom will say like that?

I checked my car yesterday, that are some spoor behind my car. At the beginning, i thought that spoor is spoil by my mom. So, i ask her just now. She told me that she didn't spoil my car b4. After that, i tell her the thing that happened yesterday and i ask her what we going to do? She scold me back and say that i can park other place anyway. I try to explain to her that HELP are not enough parking as all, she didn't believe at all. I feel disappointed when i explain to her.