And are eating 'diet' recipes, do the rest of your family do as well? Mine does. Every time I do Weight Watchers dh loses weight too, not that he needs to. I try to pick things we know and like anyway, and for the most part there is no complaining. Also, say I'm not eating a particular food, although I might omit it from the recipe (I make a tomato salad with black olives but I have no control. I'd eat the whole can if I could) so I just omit them from the salad when I'm watching. Ds is free to go to the fridge and get black olives and add them to his salad if he wants, he loves them, but rarely will he do that (too much work I guess!)
If there is something I know for sure they will not eat/like (think: Tofu noodles) I will make them something separate and I'll have my 'diet' meal and that whole idea of cooking one thing will go out the window. Or if they want something super yummy but I can't have it, I'll have a lean cuisine (which I rarely buy and have to hide) instead.