Well StarlightMcKenzie. What can I say? I am shocked, no, astounded that you had the temerity to wonder if your DD, or perhaps, should we say just D, is perhaps unusually advanced.
How very dare you?
Seriously, come on. You didn't fight for your DS for the good of your health, did you? Why is it that people can fight and get behind families who go to extraordinary lengths to raise money for a risky treatment with very little chance of succeeding, if a child has a physical life-limiting condition, but the OP is neglecting her daughter if she goes to extraordinary lengths to try and get treatment from the life-limiting condition that is ASD?
Because, ASD is life-limiting in its own way. And, believe it or not, a child who grows up with a condition like ASD, turns out to be an adult with ASD. If Starlight can give her DS the resources to capitalise on the strengths is ASD gives him and ameliorate the disadvantages, then life will be much better for Starlight's DS, her DD and her DH, as well as herself.
Believe me, given the drive this woman has, the 'neglect' that she declares over her DD is probably the equivalent of the 'hot-housing' another woman may claim over her child. Starlight is passionate and driven. She's also exhausted.
The grind of facing the difficulties your child has, trying to reduce them, not only for them, but for the rest of the family to survive.
Ok, so her DD managed to slip away and order warm milk. I would venture that she was displaying that far from neglect, she has a secure relationship with her mother, and was confident enough to 'risk' disobeying her for the prize 
For all of you who claim that a SN sibling is a drain on the NT child, consider this. DD1 has a brain malformation. She does talk, does walk, but is affected globallly. She goes to special school. We have just been rehoused because the rented house we could afford was unsuitable for her. Her sisters have gained a larger house, with a massive garden, enough to have a vegetable patch and chickens with plenty of safe room to play. All because DD1 has a squiffy brain.
DD2 & DD3 get their respite. DD1 goes to special school while DD2 goes to her mainstream infant school. DD3 potters at home with us. DD2 and DD3 get time together twice per week when DD1 is at her 'kids club' (extended school provision).
We are lucky enough to live in a different county from Star, and after quite a fight, we have support on each night of the week. Twice DD1 goes to Kids club, 1 afternoon each week we have a lovely homestart lady, and twice we have SS contracted support. That's because DD1 was getting frustrated and hurting DDs 2&3. Her sisters love our helpers as much as DD1 does. They benefit just as much as she does.
Star - keep going. You know your DD is a little diamond 