How to get my mom to let me go bigger?

I got pierced with a 18g. a couple weeks later i got horse shoe gauges (14g) I was eleven. I am now sixteen and at a 00g. I really really want to keep sizing up. But my mom says if i size up again, she'll make me take them out & swipe all of my gauges. So my question is: How do I convince her to let me go up in gauges?