I have to disagree with Mobius, too. I'd go with that scenario IF you discussed it with her, leading up to the corset, small baby steps, etc. IF she agrees to "try" to lead up to it and it's done with her permission, then I'm all for it. But if she has said "NO" then it's not right, as BDSM_tourguide said, to manipulate her.

You have to talk to her and find out why it's a limit. She may have some misconceptions about them, and you may never be able to have her wear one for you. You then have to decide how important it is to your relationship.

I've actually never given thought to wearing a corset, but I think my initial reaction would be 'no' only because I don't think I'd look good in one. The breath control aspect of it turns me on when I think about it, but when I picture myself in one ... *shudder*