Do you think my weight loss will encourage my daughter to lose weight?

Talk to her! She learnt her eating habits from you and now it's time for you to undo the damage. Talk to her mother to mother about the responsibility she has to set a good example to her children and apologise for not doing so yourself. Also talk about the risk of her not being around to see her children grow into adulthood if she doesn't change her ways. Cook together or if you don't live close by you can share recipes online and facetime cooking together. Start your own slimming club by having weekly weigh ins and going for walks together even if you need to facetime it. A bit of gentle competetiveness will do you both good. Best of luck x

It might. No guarantee. Just focus on yourself. Because you can only control yourself.