Butty, you and me are in a similar position
My DS is ASD/AS and he USED to act like you say your Chloe is acting, extremely well behaved at school,teachers thought he was a darling and then when he came home WHAM, it was a different child that lived with us altogether, he was agressicve both verbally and physically, the amount of times he,s had me in tears, he would scream and shout and head bang, and trash his room,make himself vomit on purpose for attention,not eat,soil himself,pack his bags and run off-he was AWFUL.
This year we were told that he is ASD/AS, and he is awaiting a place at the CTC to see where abouts on the spectrum he is.
The only thing that has calmed him down is having a rigid timetable,we bought him a visual timetable and put it on the wall, we tell everything in advance,obviousley there are times when we cant do that and thats where he goes off on one.
He has a behaviour chart as well that he looks at to see if he,s being good,the child psych has helped us a lot and we are yet to see a paediatrician.
As you know my DD was diagnosed with Hypotonia yesterday and she takes up a lot of my time as well,also me and DH used to be like you say you and your DH are, not talking him ignoring what was going on until i eventually wrote him a letter telling him what his behaviour was doing to us as a family and asked him to leave.
He went to counselling and is now helping me so much more and it is a lot better, sometimes our partners cant cope with the fact that our children are SN and switch off but it doesnt mean that they dont care, its just their way of coping.
I totally understand you needing to get away and going out with your freinds,i have a glass or 2 of white wine and soda every night-its my wind down time so im certainly not going to criticise you for that.
Hopefully this course that you and Chloe are going on will help, i hope so,in the meantime you rant away on here thats what we are here for ESPECIALLY those who are mums of SN kids who TRULY understand what you are going through.
Ps ive just posted you a message on my thread asking for some advice if you would have a look!
If you want to talk i am on MSN Messenger, CAT me and i will let you have my email,
Thinking of you