ok well, some people will just always feel uncomfterable. i'll tell you this now, i'm very uncomfterable when it comes to being seen even in just my boxers. when i was alot younger i was really over weight, and it just kinda carried over (even after i lost all the weight and apparently many girls find me attractive, i still don't think i am but they always tell me i am) i've done my wife probably well over 1000 times, so she's seen me naked alot, yet i still feel weird. she might not ever get over it, but you need to realize sometimes it comes kids hammering the fact that they're 'fat and ugly' in school into their head for years and it isn't very easy to get rid of if you ever even can. do your best to support her and let her know there is nothing wrong with her body, but if she still does, just accept the fact she is self conconscience about it. maybe try making her feel more comfterable, ask her how you could do such a thing, maybe having the lights off, maybe not starring at her (even if she is drop dead hot to you and you just want to stare at her all the time)

first try this, sit her down, look her in the eyes and tell her something along the lines (you have to mean it for this, i'm not telling you this so you can just get her in bed, but i doubt that's the case) and tell her no matter how un-atractive she is to anyone else it doesn't matter, you love her you find her atractive and even if she was -insert absurd weight of 1000 pounds or more here- you would still think the same. and even so attraction isn't a matter, i love you for what's inside of you, not what's on the outside.

people with damaged ego's rarely recover, i am one of them...i can have as many people as i want tell me i'm 'hot as hell' or 'sexy as fuck' and i will still never get the fact outta my head that i am un-attractive. deep down i know i'm not over weight anymore, but i will never let myself admit it.