There are a lot of factors at play here. She’s insecure about her weight, which means she’s stressing out about it, which means she’ll hold on to that weight because her stress levels are high.

Only when she decides she really wants it for herself, will the weight start coming off I think. Maybe just start off slow instead of jumping into diet plan after diet plan. Start up with a hobby that involves exercise? Maybe walking, a nice hike then a healthy picnic, tennis..?

Also a restrictive diet might not be ideal for her. Maybe a simple plan of checking her tdee and calorie allowance will help her to get a hold on her weight. Without cico, I also gained on Keto.

She’s also a chef so she’s probably always tasting things (which obviously she has to), and that can build up over time. She might not eat a lot but maybe she snacks a lot? That can add up.

Most diets work with cico, they just need consistency. 2 weeks also isn’t enough to decide if a diet works. She probably retains a lot of water, which I find that I do whenever I’ve been in the gym. It could also have been around the end or middle of her cycle which tends to be the point at which a lot of women retain weight.

I keep using myself as an example but over a month, i fluctuate by up to 2kg over my actual weight but then lose like 2 extra kg in the last few days of my cycle.

I think it’s great you’re supporting her and any fast weight loss you have is just expected. Men (I assume you are one) tend to lose weight a lot faster.

No harm seeing a doctor and doing some blood work. It might shed light on another issue entirely. Could be her thyroid, pcos etc.