I agree with the comment about keeping it pretty casual. But at the same time I think it is important to emphasize that she doesn't need to change to please you or to turn you on (well, assuming that is true). If you can honestly tell her that right now you find her hot and are turned on by her and think she is amazing and look forward to being with her in the future whether or not her weight changes, then tell her.
Because her actions kind of suggest that she feels insecure and will do whatever it takes to please you. And that isn't great. It may take time for her to trust that you will still want her if she is just herself, but that is certainly the goal.
And as you said, if she is a foodie then maybe the idea that she can eat whatever she wants while at the same time turning you on with the effects of it could be pretty appealing. Which is cool, but it is so much better if she is also confident that she is doing it for herself, not for you.
and for whatever it is worth, I knew that fat appealed to me from a young age, my first erotic fantasy after puberty was having a weight gain club with the chubbiest girls and guy I knew, but somehow I mostly blocked out thoughts of me deliberately gaining for years, and focused on my FA side. I sort of knew that it was there, but I thought I could ignore it I guess? Then not long after I got married that feeling hit me really strongly and I've known ever since that I want to be fat and that it turns me on (mostly I've resisted, because that was not the deal my wife signed up for, so I've fought to keep my gain within somewhat normal levels).
I actually think that a fair number of chubby kids have thoughts at some point that they want to be able to just eat what they want and get however fat and have that prized and admired, but most don't turn it into a kink, and most manage to eventually dismiss those ideas as childish fancy that doesn't happen in the real world. So if she has always been on the heavy side it would not be shocking if she'd had at least some dreams of letting go, even without really being a feedist.
2 years