Diets don't work, especially for women over 40. It's time to abandon them as a solution for weight loss. Instead change your perspective to doing things that you know will last. This is the true path to long-term weight loss.
Generally, if you're overweight, there's a reason for it, and it's not just as simple as not eating the cake, otherwise you'd have done it by now, right? People who've been on a diet are 'experts' in their field.
Our society, to its detriment, is obsessed with the diet as a solution to being overweight. But even people who accept that dieting is not the way to lose weight are still affected by the underlying principle behind a diet, "no pain, no gain.'