Weekly cheat meal.

I don't see anything wrong with it, as long as your overall calories puts you on a downward trend.

People get so wrapped up in this idea that there is One Right Way to do it.

Unless your beating up women to get them to make your food or something, it's okay.

You can eat all junk food, all the time (or all healthy, all the time) and it's okay.

You're a grown up and can eat whatever you please.

I don't schedule cheat meals. To me, it isn't cheating; it's overeating. Sometimes I eat more and sometimes less...because sometimes I'm hungrier than others. "Cheating" implies something that simply doesn't apply to me eating food, so it's just not something I'd ever say.

I think it's different for every person.I know that if I allow myself a cheat meal, it'll just lead to binge eating because that's the way i am. I found that if i wanted to lose weight then i couldn't have the cheat meals but if i wanted to maintain weight then I could allow myself to do it plus any bad foods that followed that day.
It can be beneficial to have cheat meals! have a look at this
http://www.bodybuilding.com/fun/5-ways-cheat-meals-can-improve-your-body.html

If it works for you then go for it. My last "off-plan" meal was NYE and have lost an additional 151lbs since.

My guess is that you feel "guilty/bad" because you haven't learned and/or absorbed the difference between a controlled decision to have a treat vs. the out-of-control overeating of treats that you used to do (which got you to the 4+ stone state you were in when you started your weight loss). I believe you're blending the two together in your mind when they're actually completely different things - and one is safe, one is not.

For four months you've managed to treat yourself one day a week and still lose weight, which is a really good track record, and yet you still cannot trust that what you're doing is a "safe" behavior. It's understandable. Compulsive overeaters (which most obese people are) tend to blindly overeat without believing there will be consequences. We numb ourselves to the reality of what we were doing and then we "wake up" one day severely overweight, miserable, etc. I believe you are afraid that if you keep up your cheat days you might return to that behavior. It may or may not be an unfounded fear. I think you need to explore it to find out.

Here are some questions to ask yourself:

1.) When you have your cheat meal, do you find yourself grabbing at the food, wolfing it down, kind of "blacking out" while you eat it, then "waking up" afterward wondering what you've done?

2.) Do you taste the food? Do you enjoy it? Or do you feel "compelled" to eat it "because you can"?

3.) After you have your meal, do you stop eating? Or do you continue to pick, pick, pick at the leftovers without thinking?

4.) The day after your cheat meal, do you find yourself with strong cravings to eat particular things, or eat compulsively, and it's like trying to "turn the Titanic around" to balance yourself?

If you have these feelings, I'd say cheat meals may not be the answer for you because that means they are "compulsive meals", not "controlled meals", and you're keeping the unhealthy habits alive. You might want to re-tool your strategy for letting yourself indulge a bit.

However, if you relatively plan this out, still kind of budget it into your day, eat slowly and deliberately, enjoy the food, leave it alone when you're done, and don't have any "after shocks" the next day, then my friend you have ARRIVED at a very healthy place in your life, and if I were you I'd try letting go of the worthless guilt you're piling upon yourself for no reason. Just let yourself enjoy it! Don't be a nagging mother to yourself - be a loving mother who both lets you have fun AND keeps you accountable. It is possible. But the choice is yours whether to hang on to the negativity or not. It will take practice. Try it.