2 different people!

Anyone else a great eater Monday-Friday, then an absolute junk eater Friday evening-Sunday?
I tend to eat and stick at around 1200 calories during the week, when at work it's easy as I take food in with me.
Weekends with husband = chipshop takeaways, Chinese, Indians, buns, chocolate, jellies, crisps... aghr.
I'm very fortune this week in that I lost 2lbs after eating so much junk (also had a lot of beer as was husbands birthday), but I feel I'd do so much better if I could somehow eat better at the weekends. Any tips?