I notice she's using supplemental oxygen. This situation can become a death spiral. Not exercising leads to getting fat. Being fat leads to not exercising. Not exercising leads to getting fatter. Etc.
Having "enablers" in your life only makes it worse.
If she’s on supplemental O2 at 27 years of age, it won’t belong before she’s six feet under pushing up daisies. She’ll be lucky to make it to 30.