I'm severely overweight too OP, and could easily blame my DH. I'm disabled, so he does all the shopping, and I often tell him not to buy certain things, because I know they're not good for me, and I have no will power, but he buys them anyway, because he knows I don't get much fun in my life, and thinks that buying me what he looks on as 'little treats' will cheer me up. However, at the end of the day, I AM THE ONLY ONE TO BLAME! I don't have to eat these things, and if I didn't, he'd eventually stop buying them, but I have NO willpower, and so of course the weight continues to pile on.
From what you've told us, I also can't help wondering whether your kids are getting fat too, as if you're catering to a faddy eater, and live with a man who will turn to McDonalds as a first choice, it doesn't sound like anyone in your house is eating a healthy diet. So for your kids sake, sit down and give some serious thought to the habits you're teaching them, with what you serve up.
So, while I do empathise with your weight problem, you have to STOP BLAMING OTHER PEOPLE, and decide what YOU want. If you want to be slim again, you know what to do, it's not rocket science, simply a choice that YOU need to make.
Oh, and a little tip in case no one else has mentioned it, as soon as your faddy eater has finished, pour washing up liquid liberally over the left overs, and stop buying or making biscuits, no one actually NEEDS this sort of food, and once your kids start the habit of having sweet snacks to grab, it will be with them for life.