Masturbating At A Family Campout

At 12 I was on a camping trip with my family. It was hot and humid, I lay half naked on top of my sleeping bag trying to go to sleep. I was new to masturbating and my hand slipped under my panties and my fingers did the walking. When I hit my climax I let out a loud moan. A second later my mom pushed her head into my tent, I was still laying half naked with my legs open and my hand in my panties. My mother said 'sorry' and backed out and left me alone.