Halloween Candy Insanity

I have been doing really well at avoiding the sweets. Due to a nursing baby who suffers if I serve "chocolate milk" I have had to stay away from the chocolate enough that I know it makes a difference in my diet. Halloween has ruined all that. I did pretty well for about four days and then it started to get to me. Literally calling my name from the pantry shelves...
So yesterday I busted into a bag of mini Snickers left over from the big day and had 'a few'. They were very yummy. Today the baby is barfy and I feel so guilty and yet, the bag continues to call to me.
I gave away one bag to my sister yesterday to avoid more temptation but there are still three large bowls full of the candy my children collected plus two bags of the stuff we were passing out. How did we get back so much more than we passed out? I am seriously considering just letting my kids have at it until they are completely sick and have learned their lesson. Yeah, not gonna happen, the lesson learning part I mean. I know from my own experience as a child that you don't really learn not to eat too much candy when it's offered like this, look at me now scarfing down the bag of Snickers... did not learn lesson as child.
My biggest problem is my kid #2 who has issues with sugar/food. She is completely nuts when it comes to candy like this. First she has a messed up metabolism or something, so with her, a tiny bit of sugar turns her into a monster much like the Hulk or some kind of inverted Popeye. She goes nuts, she can't focus, she throws tantrums (age 6 it's not pretty) and she becomes obsessed with things eg;

her: can I paint the wall?
me: no.
her: can I paint the wall now?
me: no.
her: can I paint the wall just a little bit?
me: NOOOO!
her: waaaaah! I want to paint the wall so baaaaad!!!! waaaah!

Like what is that? OCD on sugar? She's always hungry and I get that, she does have sort of a high-energy lifestyle but the sugar thing is like throwing gasoline on a fire. My three other kids do not have this problem, just her.
So here I am trying to ration out like 15lbs of Halloween candy between three kids and wishing more of the neighbors were the cruel people who give out toothbrushes, stickers, pencils, and fake vampire teeth. WE WANT CANDY!