I'm the only 16 and a half year old I know that still needs a sitter for her & her brother for the weekend!

I don't know what to do cause I'm embaressed. I am actually really mature but my mom is all "well what would you do if there was an intruder in the house!?" Chances are, an intruder won't come, but it is true that you never know. Once, my cousin rang the doorbell at like 10 pm and my friend's mom and the cops came (we didn't know it was him, he kept ringing the doorbell) and we ran upstairs to my room and tried to see what this person looked like. We did the responsible thing, he wasn't an intruder but still it's something. I don't know what to do, my mom tries to make me feel guilty about it she's all "I'm stressed out enough, don't do this to me!" & makes me feel terrible but I can cook and take care of my brother and if there was an intruder, we'd do our best to get out of the house asap. I mean, an intruder could come and hurt my mom, too. Hells, she is as big as I am. She thinks I'm a baby, but I'm not.