Permanent Marker on White Wood?

I drew a heart on my hand with red permanent marker. Then when I sat down on my chair I (not knowingly) put my hand down on the white chair. I went to go to the bathroom and came back to see it on the chair, I'm so panicky. The chairs are new and my parents will kill me! Please help. And please answer ASAP! I tried Expo over it, but it only made things worse.

By Chrysanthemum J