I'm not too worried about coering it up, I plan on getting it in quite small writing so I can wear bracelets / a watch to hide it. I plan on going into education, and it is useful to have a watch for that anyway.
I don't think she'd go to the extreme of kicking me out. When my dad got one last year she didn't talk to him for about 3 weeks ... I'll try explaining it to her though
