I think to get the effect you're looking for you have to go to really sheer. Stuff that looks really sheer you will think holy shit, that's sheer, but then when you're out in a restaurant and sitting at a table, it's not that bad. And even when you're out in the sunlight, I can see it, but a lot of people aren't looking at the woman's chest, so they walk by oblivious.
Also, my wife seems less concerned about it than I am. I guess because I can see and she can't, so she just sort of forgets about the fact that her boobs are visible. If you are looking.
I love this top!