When My Parents Use My Stuff

For my last birthday, I saved all my grass cutting and babysitting money to buy an iPod Touch. It was all my money. Now that I have it, my mom uses it all the time. I tell her to get off because she didn’t pay for it and it’s not hers. She just says “It’s my WiFi you’re using!” and continues to use it. But she doesn’t do work relayed stuff on it. She just goes on Facebook. She wastes my battery. It’s my iPod and I paid for it. She shouldn’t use it.