Ladies...it won't be as bad as you imagine!
What we need to remember when we have our "I was bad" days, is that it takes 3500 calories to make a pound of fat. That's 3500 ABOVE and BEYOND maintenance calories. So if your maintenance calories (not weight loss calorie level) is 2000 calories per day,(just an example, that would be a pretty active/athletic woman, I think) you'd have to eat 5500 calories in a day to gain one pound in a day's worth of eating. In a week's time, if you've "been good" otherwise, averaged out with your weight loss eating, you're most likely still going to lose for the week.
I allowed myself (when I was paying close attention) three meals per week to eat what I want, when I want, no guilt allowed. Could do them all in one day, or spread them out. People who are skinny do it all of the time...there's no reason we "tubbies" can't either...we just have to pay attention and keep control...control would be key, and what's been missing in our previous consumption habits!
:)