Here's a few options:
1.) Wear a bikini if you have the body. Most tops out there are super padded. If you are not able to wear a bikini, you are likely to still have luck finding a one-piece suit with great padding anyway.
2.) If no time to find a suit, go to a fabric store and ask for the bra inserts. People buy them and have them sewn in wedding gowns (I did myself). See a seamstress if you want professional results.
3.) Victoria Secrets has a few great "push up bras". You can't look bigger and have more cleavage at the same time (if you choose a bra that fits properly, that is), so I'd opt for cleavage if you are wearing something low cut. (Obviously, this won't help you with your bathing suit issue, but VS does sell bathing suits with the miracle bra built in. For a fee, I bet they'd ship it pretty quickly.)
4.) Make-up, my friend. Take a darker-than-your-own-skin color (say, one or two shades darker) and brush that good-old shade right between those boobs. Works like a charm. I've never tried this in a bathing suit, but you can find waterproof "leg make-up", so why not try that between those perky breasts? Or another waterproof makeup?
You can also "highlight" the area above your nipples by brushing on some loose shimmering light powder. It "highlights" and the make-up between the breasts defines and gives depth (ie, more cleavage)
5.) You can buy "gel inserts" at JC Penny. It's like silicone implants but they "stick" to your skin. They can be worn under bathing suits and dresses, etc. They are obviously backless and run about $60-70. (Personally, I am not comfortable with two decent sized cups of gel sticking to my flesh...but many people would be fine with that.)
Best of luck. My best advice, though: Learn to love your body and do NOT marry a man who thinks less of you because you are not Pamela Anderson.
My own experience! :)
· 1 decade ago