Do you think it's inappropriate to wear a bandeau bikini top at the beach if your family is there?

I'm 15 and I'm going to the beach this weekend with my extended family - cousins, aunts, uncles, etc. I only have a strapless bikini top and I was wondering if wearing it would be considered like slu`tty. I'm not very self conscious and I wear a size 34b bra which isn't that big but idk. Just tell me your thoughts? Thank you.