Sewing swimwear?

Lately, I've been obsessing about sewing a swimsuit.  Now, in March in Germany, while 6 months pregnant, I have absolutely no need for swimwear, but I'm dreaming about it just the same.  While I have countless bikinis, I only have one one-piece, and I definitely won't be wanting to wear those bikinis to take my little man to the pool after popping out a kid in June.  I am refusing to buy any supplies right now, though.  I have been buying quite a lot of fabric recently, after several months of buying nothing.  I need to sew down some of this excess.  

I'm thinking a bandeau tank or tankini with lots of boning and support for the girls.  I'd also make a strap in case it just wouldn't stay up.  I really like this one from J Crew.  (J Crew pics are linked)

... maybe it reminds me of my wedding dress.  What do you think?

By the way, that's my awesome mom, who made my awesome dream dress!

I also really love this one, but I think that draped top would be difficult to do without a pattern (and so far, I haven't found one too similar - just twist tops).  I can't visualize what the pattern piece would look like.  I can see there's a center seam between the bust, but I'm not sure...

I think I would convert either one into a long tankini, too.  I think it would be easier to fit without worrying so much about the length and pulling the top part down.  Also, I could make it a little swingier to camo the belly more.