I Don’t Know What To Do!

I’m 18, still living with my parents who are great parents. However, I have a tattoo of a sunflower on the side of my rib cage. My dad is very against tattoos, only on women though (he thinks it’s “trashy”). He told me a few years ago that if I ever got a tattoo, he’d be taking me out of the will. Well I’m going on vacation with my family in a few weeks, and we live in Florida so the weather may be warm. I don’t know if I should tell my father I have a tattoo since i still live with my parents or just hide it from him. There may be a chance we go to the pool and use the hot tubs, but I don’t want to have to cover myself up because of his feelings. What are your thoughts?