Me [29 M] with my girlfriend [27F] of 9 years, I used to be obese, lost a lot of weight and now look thin. She called my figure "disgusting" and "skeleton like" when we were about to have sex.

You guys can check my post history and see my transformation if you are curious.
I used to weight over 110kg, after battling several weight-related problems I decided to start losing weight. I now weight around 68 kg and my BMI is normal. I have some loose skin but it's not that bad, and it's barely noticeable.
She has been supportive of my weight loss but in the last couple of months, she has mentioned that I've become too thin.
Today, we were about to get intimate and when I was lying in bed naked, she said that my figure is too thin, that it's "disgusting" and "skeleton like" when she said it, I stopped and put my clothes on and went to another room. My self-esteem is now completely destroyed.
She tried talking to me and mentioned that I was now too thin and that she was getting worried. I didn't answer her because I have no idea what to say.
I seriously do not know what to do, what to say, or how to react. Any advice on how to handle this situation?
TL;DR: Was about to have sex with my girlfriend, she called my body "disgusting" and "skeleton like" after I lost around 38 kg. How do I confront her about what happened?


Source.