Tell her that everyone is on you about it and ask her to PLEASE buy you some disposible razors and shaving cream. Shaving is easy, but shave with the direction of the hair, not against it. Otherwise, you might get a rash. Good luck!
I am a mom... I have a 13 year old son & an 11 year old daughter (plus 2 preschoolers!) both of my older two are ready to shave when they choose too. My daughter used my Nair on her legs, after I told her she couldn't shave yet... I didn't blow up on her... There was nothing I could do! It's not like I could glue it back on lol. If it bothers you, just do it... Your mom won't be too mad. I normally wouldn't suggest going against your mom, but she's not the one who is getting messed with about it! Good luck!
Well, it's your body, so do whatever you want. Just make sure no one catches you doing it. By the time your going to be older than 15, you're going to start shaving, so if I was you, I would get a head start.