Fair enough. Sorry if I'm sticking my nose where I shouldn't. I've been the overweight/unhealthy teen before. I dieted throughout my teen years and it's not fun. The difference was that I was extremely unhealthy (as in I was at my current weight at grade 10...). The mentality of trying to fit in and be healthy can be a daily challenge- especially when the only thing people really have in common now are sitting down around a table to eat.
If it helps at all maybe a sports team with a schedule would keep her active. At that point it's not a "I don't feel like exercising" so much as a "my team is depending on me being there". It has an heir of responsibility and accountability and would help her feel like she's a part of a group of young girls.
SW (Nov 22nd 2011): 333
Current Weight as of Nov 25 2015: 248
Short Term Goal: Fit into the shirts I got on my honeymoon at disney and universal in august next year when I go back to for my 1 year anniversary
Met Goal: Be a 2x Shirt, Fit in a standard airplane seat belt without the use of a seat belt extension
Long Term Goal: 166lbs (One day!), Buy whatever cloths I want to wear.
Pain is temporary, quitting is forever- Lance Armstrong #NoExcuses