So you have one glaring issue. Christmas and night shift aside I mean this in the kindest way that you’re going to have to get tough and combine in a united front.
1- speak to the gp or doctor immediately
As a mum with two older ASD/ADHD siblings I remember the constant physicality of separating - divide and rule - me and DH did anything we could to survive. So I get it.
Now you might be a hippie mum or not
Either way you need to try something different
I think the shipping the older one off needs to stop. You need to deal with the 5 years olds behaviour even if you parent differently because of his ASD it doesn’t mean that you cannot implement consistent and firm
behaviour management.
I’m not saying shouting or anything like that but clear simple
No we’re not doing that tonight
It’s bedtime
We don’t play at bedtime
The younger needs to see- even if he can’t understand - that as a family you work together and he needs to help as well as mummy daddy and sibling are tired.
- Bedtime routine in his room or bed: minute he gets up walk him back to bed.
Wants to run- a simple - No it’s bedtime
He wants to scream cry, kick off - walk him back it’s bedtime. KEEP REPEATING -
Running to the door to
Open it - deflect and walk or carry back.
It is exhausting/ soul destroying but the consistency will help
If he stays even for 5 minutes - praise reward hell set up a nighttime sticker chart.
He has learnt that bedtime is fun time that’s not an option.
I remember doing this for 3 hours the first night
No it’s bedtime.
No we’re not playing
No you cannot disturb your sister
Etc you get the message because at the moment the 5 year old is running riot and yes he has ASD and yes it affects the whole family, you parent differently but you can still manage their disability to give you some family peace