BradfordLass, Sw is not really dieting, it is changing your eating habits to make them healthier and learning which foods are filling and less fattening. Weightwatchers does the sam. They do a lot of research on the latest finds on what works and why people gain, because of emotional or physical reasons. It is possible to lose and keep the weight off. It sounds as if your daughter is doing fine, Joanna. Slow and steady does it and then it stays off. No quick fix. And what does not work, as has been pointed out, is other people nagging you about weight.
I lost 8 stones from 2002 to 2007, went from size 28 to 14 and have kept it off. I'm 73 now. I'd been around a 16/ 18 most of my life but went up when I moved to a home next to lots of takeaways .
Well done to daughter for that first stone off. She knows how to do it now and that the change of eating works. No need to be hungry., Lots of support in the group. And with a baby and job too she is doing great!