We have DSD 7 with us full time for the summer. It pains me to say it but she's gained a lot of weight this year. Until about age 6 she was consistently 30th centile for height and somewhere around 20th-25th centile, she's now 30th centile for height and 90th centile for weight. BMI comes out at 98th centile on the NHS BMI calculator. Her weight has increased steadily over the last year, she's had a recent growth spurt. We've tried talking to DP's ex about it, she just gets very defensive. The relationship there is already quite difficult. It's obvious she thinks it will sort itself out and isn't going to do anything about it.
WIBU to just put DSD on a diet this summer, get her exercising more etc and take control of it ourselves while we have her with us?