I saw my gf naked for the first time and I was really surprised - I don't know how to talk to her about it

I know this is a weird topic but I figured I'd ask here. If I should not have posted here, I apologize. <br><br>I've been dating a girl for 1 year but we only recently decided to have sex together. We did it last night. While we were changing to go to bed, I was surprised to see she was a lot more overweight than I expected her to be and I'm really not sure how to talk to her about it. I've only been able to see her in clothes and she's always worn baggy clothes so I had no idea.<br><br>I really do not have a problem with her being overweight. I'm Christian and I believe that a lot of things are sinful to do before marriage, so I don't think we should be able to see each other naked before then. The problem is she works out regularly and says she's always been 'thin' so she doesn't understand why she is overweight. I don't want to call her a liar, but I don't want her to keep eating junk and working out thinking she will eventually be thin. Also, if I don't tell her, she will think I am calling her a liar.<br><br>I just don't know how to have this conversation with her. I've never had it before and it makes me uncomfortable. Thoughts and Advise would be great!<br><br>Edit: For those saying I'm shallow or calling her fat, I am not. I am concerned about her health. I believe she would look a lot better if she were thinner - not just physically but I think it would make her more confident too. I am not saying she is fat, but she is definitely not at a healthy weight.