If I'm 17, and want to get a tattoo can my 20 year old cousin take me?

I'm 17 and my cousin whose my bestfriend also is 20, I was wondering since I'm still considered a 'minor' would she be able to sign for me? Were getting matching tattoo's for a family matter that's really important for us. My parents don't care but she and I want to do it on our own.... show more I'm 17 and my cousin whose my bestfriend also is 20, I was wondering since I'm still considered a 'minor' would she be able to sign for me? Were getting matching tattoo's for a family matter that's really important for us. My parents don't care but she and I want to do it on our own. would she be able to sign for me?
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