I am down on the coast with one of my dc and 2 of dp's. We love swimming in the sea but the waves are quite rough and all our wave catching and jumping is putting my rather old bikinis to the test!
I'm 50 now and boobs are definitely not as firm as they were when I bought the bikinis years ago and there have been a few incidents where I've caught a wave in only to have to make sure my boobs are back in place before I get out the water! The bikini is definitely the right size but I think I need something a bit more supportive where boobs are strapped down now to swim.
I had a quick Google and saw some Speedos that looked ok but not sure if anyone has any recommendations. I wear a 34D.