I know you normally write about male gains so maybe this isn't up your street but imagine a celebrity who's considered a sex icon. Her fanbase is primarily men crushing / thirsting over her, she drives them crazy.
Her nudes leak for whatever reason, as is a big problem irl with female celebrities. She takes an absence from the spotlight, she says, to focus on "herself".
Word gets out to only her die-hard fans that she's now doing adult movies.
Imagine a guy, a fan of hers, tuning in obsessively. He keeps up to date but... she's putting on a bit of weight. He figures now that she's not in the spotlight anymore she doesn't need to worry as much. Maybe the leaked nudes stressed her out.
It's definitely her. Not an impersonator. She keeps gaining weight.
She makes an appearance in articles again because of paparazzi but it's just a scandal of her noticeable gain. That confirms it for him that it is her.
To him, her beauty doesn't wane, which scares him. Her breasts and hips get bigger, her thighs widen, her fingers and feet chub up, her belly starts to pool. Most of the time, she's spilling out of the outfits the porn directors have appointed her. Her roles change from the girl next door to the apartment next door to the role of a MILF. It's a gradual change. The mom jeans, 90s-ish updo, and copious cleavage in overtaxed leopard print still leaves him breathless. In that one, something new happens though that he doesn't pay much mind to at the time:
She presses the guy's hand to her naked stomach as she's riding him and says, "It's tough being a mom. Look how big they made me."
A day or two later he checks her online. No kids. He understands it's just for the plot, that it wouldn't have been real, but he had to check. Why put attention on how big she is? The title does say "Fat Curvy MILF"... Hm.
That isn't her biggest. She keeps going. Going. Going. She goes from "curvy" to just fat. She's still curvy in a way, but it's not what you'd think when you see her.
She reaches the point of barely walking in her movies. Her arms are thick and jigging, her chest is massive, her belly too. She's pink-cheeked and panting like she's having sex even before the event happens. Every step to this point that he's witness he's been no less attracted to.
If anything, he's harder than he's ever been. He can't get off without thinking of her. He wants to feed her. He wants to feel her all over. Feel the softness of her fat in a discovering way, he's never felt anyone like her before.
The guy in the porn (different guys – sure – but the guy of the hour) becomes a feeder. He can barely breathe as he watches it. He's hand feeding her cake and she's moaning like it's pleasuring her.
He can pretend the guy is him.
This is neat! You're really good at making me think about new slants on some of the more common dynamics/tropes. I like the unintentional slide into the FA/feeder role, it's so often the gaining/feedee person who can't help themselves from sinking further and further into the kink. I can totally see a guy going from mystified by her change to gripping tighter and tighter to his crush on her as she changes and subsumes everything about herself physically that used to be attractive to him and core to her persona.
Can't emphasize enough how brilliant that is to have the "decline" be into fat attraction in general. It makes sense; it's taboo, it's confusing for him, he slowly admits he's not just gawking at her change, he's relishing watching her get bigger and thinking it's weird, but he won't be so rapt by her if she gets any "worse". But he's wrong, and every subsequent time he sees her, she's fatter and he's still into her. I especially love the detail about him reading something sexual into her baseline panting once she's getting to that size, really nailed that type of subconscious eroticism developing for him. Great idea as always!
Also re:me normally writing about male gains...
So funny because I read that bit of your ask and I was like... huh, no I don't? So I went back to my 2026 stories directory post and it's entirely BHM/BHM/SSBHM or POV/genderless stuff written this year and I'm just like huh. I absolutely did not clock that I'm in such a Big Guy era at the moment lol, but I love writing about anyone getting fatter of any gender :)
I think 1) my perception is that there's a lot less male gaining writing out there and I did at some point I did intentionally try to lean into writing more about guys gaining to explore new premises, 2) I often have Complicated Feelings about being a guy in this online space and I may be overcompensating out of concern that what I write could in even the smallest way contribute to/mirror some of the behaviors/dynamics that make this community difficult (for women) to participate in, and 3) big guys are hot!
Thanks for the ask and the self-reflection! haha