My daughter is becoming obese.

that’s always a difficult situation. maybe sit her down and ask her if there’s something going on in her life that’s causing extreme emotional distress. tell her you love her but you can tell something is going on. as somebody who gained a lot of weight as a teen due to a medication i think it would have helped if my dad had offered support, whether it be purely emotional, a gym membership, or offering to pay for a dietitian