How not to put on weight as a lone parent?

[Dumdumbetterrunrun]

Just for clarity, I'm a size 14/16 who has always struggled with overeating. Just out of a long relationship. I'm so desperate not to put on weight but I'm struggling with not rewarding myself with food.
Ex has children one bloody day a week 11-6. It's just things like Saturday nights where I am finding it hard to not order takeaway or have a fattening food movie night. My children are 6 and 8. It's so easy to just get caught up in 'let's stay in and watch films and eat' on a Saturday. I've always usually gone out but I'm finding it very tiring with working all week, being responsible for every bedtime, bath, reading, homework, all the housework, DIY...
I'm trying to get back into exercise but I'm just exhausted and I guess maybe a bit depressed too.
All I want to do is eat and watch films.

Junior parkrun with the kids Sunday morning?

It's more motivating (and practical) when it's for all of you

My DD has similar aged girls. They do yoga, just dance etc and we all get out as much as possible. It helps that they have a dog. It gets criticism on here, but this is why some Mum's do a pamper night.

What if you are careful during the week and allow a treat on a sat night - I think we all need a break sometimes

so you could have a homemade pizza (wrap and onions and mushrooms with lower fat cheese)

As your leisure time is by necessity home based, you need to either break the link between movies and food by doing something else whilst watching (nails, knitting, face pack) or by planning your movie food to be part of your daily food allowance. I do the second and cut down in the day and then have a haul of food, some healthy, some treat, to graze on through the evening.