Lifestyle tips

Honestly if you're not happy with the fact that they are losing weight, then maybe it's best to move on and find a partner who's into the fetish for the long run. I hope I don't come off as sounding like a dick... But why be in a relationship if you're not happy?

As someone that's gone through this cycle multiple times, diets are a key component in the road to accepting they're going to be fat and enjoy the glutton lifestyle.

Everybody has those chapters where they're a little stunned "I never thought I would get THIS big." But then a failed diet later, they realize they're just a new pair of pants away from comfort and the life they actually enjoy again.

I mean if she’s totally not in to gaining then probably best to end it tbh not to be harsh

But if she is into it but simply thinks she’s gotten ‘too big’ or having a moment of doubt I wouldn’t worry about it too much.

She will almost certainly gain back all the weight she looses plus. Just be supportive of it for now.
Don’t be sneaky about it be clear about encouraging her to eat, in my experience she will eventually turn back to gluttony.

In fact some of my favourite relationships have been with women who keep dieting back down, it allows me to enjoy watching them put it all back on again.

But again you want to make sure she’s on the same page. If you want a real gainer then you need a real gainer

If her doing as she pleases with her body pisses you off or strains your relationship you clearly don't love her. If you did you'd want her to be happy. It sounds like you're more focused on you being happy. I think you should consider finding someone else.

This was my first thought as well...

You didn’t give much context so I’m left to judge the situation based on what you’ve given.

If they’re just trying to lose weight because they want to and you see that as a strain on your entire relationship, you might be an asshole.

Love should be more powerful than raw sexual attraction or fetish.
If this is not how your mind works, I suggest you have a self-reflexion about what is a relationship and what is love for you.