Why not try to ask her if she can teach you how to use her camera responsibly? She might see that you are interested in respecting her stuff, that you value HER opinion and knowledge, and you
might share some nice one-on-one time.
Parents love to share their knowledge IF you ask right... and pretend not to be bored when they (we) get off topic and talk about they was it was when we were young.
Heck, she might even take the photos for you!
John