Well this is a tough situation, I am currently in it. My Mom dislikes almost everything and my son has almost everything possible pierced and he has alot of tattoos, I just got one myself. As a Mom it does not bother me that my son has pierced and tattoo's but my Mom thinks it is her job to voice her opinion each and every time she sees him. How my son and I decided to handle it was to basically just accept that she does not like it, we tell her (not like a smarty but nicely) yes we know you don't appreciate it. But on the other hand I think she is starting to accept it a little because now when she sees him whe will ask if he has any new tattoos or if he got anything pierced. I would suggest maybe doing the same thing don't hide it from your Mom and acknowledge you know she isn't a fan of it. Sometimes Moms (yes I am talking about myself) say things and think we are helping smile