Maybe she could try Weight Watchers Online. It's worked for a lot of people (even the real happy ones that just got lazy and took their selves for granted). One of the things I read somewhere is that when someone has gained a lot of weight that they should first strive to lose that weight through portion control (as with WW) and once they are at their goal weight, then start working out and 'sport' so that they maintain their new and improved body weight. Walking while dieting is a good start even before she loses anything. Maybe she'll be up for that with you everynight after dinner?
If she's good to go with WW (which only consists of everyday foods, no gimmicks) then do encourage her and compliment her on her success. It won't take overnight (about two to three pounds per week) so don't push her about it anymore once she's enrolled and started her plan.
Last edited by Wakeup; 23-10-13 at 12:17 AM.
Reason: typos
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion