You didn't mention where you two happen to work?!
Anyway...thumbs down on the (as Crompsin referenced) IV bags... totally not necessary. Seems like the higher neckline and maybe the camisole (although I've never noticed this section at Costoc!) options already mentioned should do the trick. Although if my ex-w would have shared a little more frequently then perhaps she wouldn't be my ex-w! Enjoy the views when you get them ... that may be as good as it gets.