Bit of background. My mother has always been overweight - not morbidly obese or anything but about a Size 18 with pretty poor body composition (she's about 50% fat which is pretty unhealthy). She has always been desperately unhappy about her weight but in the 30+ years I have known her, she has never had any true and lasting success in losing the weight and keeping it off.
She is the kind of person who is always starting a new diet or starting again on Monday and will always talk about dieting and always make little disclaimers when she eats something she "shouldn't" - example, she drove me made during a recent visit when I'd offer her a biscuit - rather than "yes please" or "no thank you" like most people she'd launch into a huge disclaimer about how she doesn't usually buy biscuits and how she doesn't have them in the house and how it wouldn't even occur to her to have one, etc etc so I'd put the tin away assuming she meant no and then she'd say "oh but I'll have one just to be sociable" (fine - have one - but for gods sake enjoy it!)
She has always maintained that its her "metabolism" that causes her to be obese and I'd imagine that whilst she doesn't "get away" with what some people do (we all have a slim friend who appears to eat whatever they want and not have to worry) I am not convinced there is anything terribly unusual about her metabolic rate. She's 65, it will be slower than it was, but her hair and nails grow at the rate of knots (apparently a good sign of a well functioning metabolism), she has no thyroid problems.
But I know she can lose weight at a good rate if she's consistent, as last year when she was staying with me, she embarked on a fairly strict regime which I had sucess with in shifting my baby weight. It was my house, and my kitchen, and I was providing the food, so there wasn't really any scope for cheating. She was climing the walls but she stuck with it and did quite well for the duration of her visit which was several weeks. So I know she can lose the weight and that there's not anything wrong with her metabolism - her weekly losses were only marginally less than mine, and I'm 30 years younger.
I've caught her out lying about things on countless occasions. Often quite small things that nobody gives a damn about anyway, not things where she's been backed into a corner, its like she lives in her own little fantasy world. So I can't help thinking that when it comes to dieting, food, and general habits, she's not doing the things she should if she wants to lose weight and then maintain it, and she's been lying about it so long she's starting to believe her own bullshit.
AIBU to just opt out of these discussions? I have tried supporting her but in doing so she seems to think I should have the answers when she inevitably comes off the diet and regains any weight she lost. Its starting to blight any time we spend together - constant talk about diets, food, ridiculous statements being made on her behalf. AIBU for wanting to tell her to stand on her own two feet and reap what she sows, and to leave me out of it, or should I try and continue actively supporting her? AIBU for wanting to give up and opt out?