Matching tattoos with his sisters

My boyfriend wants to get matching tattoos with his older and younger sister and I just don’t like the idea.

Now I already know what 99% of you are are going to say lol, but I just don’t feel comfortable.

I don’t have tattoos, never will and I don’t like tattoos, me and him are in a serious relationship of 2 years and a half and he knows how much I want him to stop. And so when he brought up they all wanted to get matching tattoos I got upset.

I don’t like the idea of him matching with anyone else, especially if I “can’t” match with him.

Ok you might disagree I get it but I told him I’d really think about it and I just don’t know how to tell him it’s nothing against him and his sisters just don’t like the concept of them matching, yes I’m close with them and I know it’s not my decision but if they do get it I will not be comfortable