Plus when you're old and its all wrinkled you may not want it there. That is just my opinion.
Well, everyone is entitled to their own opinion, and I have thought about the way it'll look when I'm older, but to be honest, if i live to be such an age where I'm covered in wrinkles, and my pecs start to resemble breasts, and my joints are old and tired... a little bit of ink on my back will most likely be the least of my worries.
My advice on honoring your mother would be to convert or become traditional Catholic like she was.
I couldn't become a Catholic, I'm against religion and after reading this forum, I'd sooner commit suicide then be associated with the Christian mentality.
My condolences on the loss of your mother. 
If you don't mind my asking, what is her name? (You can pm me if you like). I will pray for the repose of her soul, and ask her intercession on your behalf.
Were you baptized Catholic as an infant?
Thank you for your condolences and your offer of prayer to my mom, her name at birth was Kathy Chamberlain. I'm not Catholic, nor was my dad, and my mom had become less devout to the faith when she was younger and that carried with her for the rest of her life. She kept going to church on Christmas (and possibly other religous holidays, I'm not sure) but she wasn't as devout as she was in her youth, so I actually didn't even relaize she was religous untill after her death, so that's basically a long answer to your simple yes or no question about me being baptized lol.