Then try to lose weight, from 50 kg to 40-45 kg.
Actually, she's fine, so she really doesn't need to lose so much weight.
During this period, the most radical way I took was not to eat anything after 5 pm, but to drink water and eat fruit. I persisted for a month and really lost a lot of weight. But she doesn't suggest it, because it is harmful to the body.
The recommended method is to control diet properly and increase exercise. For example, you can do dumbbell exercises in a mineral water bottle filled with water at home.