Congrats on the tattoo! That sounds awesome! No, you're not being stupid. But, I will say to me it sounds positive so I don't get why your T would have a problem with it, but I'm also not an expert so maybe there's more to it I don't know?
No matter what she thinks, it sounds like you're happy with the tattoo, so if it isn't bothering you then it's probably not urgent that you discuss it. I know I am always prioritizing what I want to talk about and around my T's vacation I wanted my last session to be low stress and positive. This is actually an area I'm working on, just sticking with what I want to do and not second guessing myself

When she comes back you will show her right?