If the goal of Gran Gran's cooking was to pack pounds onto her granddaughter, it was certainly working. In the two months since she'd arrived, Claire's weight had completely reversed course without her realizing it. She was eating like crazy; the girl just couldn't stop herself. Breakfast, lunch, and dinner, Claire ate until she couldn't swallow another bite, even at school. Gran Gran's colossal boxed lunches were perfectly calibrated to pack Claire's stomach as full as it would go. Claire couldn't resist pigging out, even at school in front of her much-thinner friends. It was like a Thanksgiving feast that never ended. And her weight was reflecting that. She'd grown back into her largest clothes in no time, and it wouldn't be long before Jen would have to swap out Claire's old clothes with bigger versions. Each meal tasted better than the last, and Claire couldn't help herself from making an absolute pig of herself. The food was so good that Claire hardly even noticed the extra weight; when she wasn't eating or in a food coma, her mind was preoccupied with thinking about what she would eat next.
While Claire didn't notice herself growing heavier, Jen and Gran Gran certainly did. Even without knowing her exact weight, her mother was certain that Claire was the biggest she'd ever been, and showed no signs of slowing down. For the first time in ages, her chubby belly and thighs were swelling with fresh fat by the day.
However... There was a bit of a side effect.
While Gran Gran's meals were indeed turning Claire into a porker, they were working even more effectively on her mother, who was just as enamoured with her mother's delectable, fattening feasts. Without a job to get her out of the house, Jen quickly found herself surrounded by a never-ending supply of irresistible, fattening morsels, and nothing to stop her from glutting to her stomach's limits. And her body was showing the results.
This was made worse by the fact that Jen was actually getting quite good at replicating Gran Gran's cooking. So on the rare occasions when Jen's increasingly-gluttonous appetite outpaced Gran Gran's ability to cook, Jen had no problem making herself a little extra to keep her stomach satisfied.
Of course, even if she spent the whole day eating, that wouldn't stop her from joining in on Claire's nightly feasts, stuffing herself silly alongside her daughter.
All of this combined meant that, for the first time since she'd had Claire, Jen was getting bigger.
Jen had never been a light eater. And she had never been a light girl, either. She was no stranger to being the biggest girl in a room. She'd been rather heavy when she'd married Ron, and her weight had only gone up when she was pregnant. But now, for the first time in a long time, big Jen was getting bigger. And it was happening fast.
After all, with how much cooking practice she'd been doing, all that food had to be going somewhere. That "somewhere" turned out to be Jen's increasingly-wide belly, thighs that were beginning to test the seams on her pants, and hips that seemed determined to get stuck in doorways. Two months of relentless overeating and Gran Gran's fatty, buttery meals had left Jen fatter than she'd ever been. And like Claire, she showed no signs of cutting back anytime soon. If anything, her improving ability in the kitchen meant that she was eating more than ever.
With how pleased she was with Claire's increasingly-overweight frame, she barely even noticed that she was packing on pounds just as fast as Claire, if not faster.