@SausageRollFan
Posts saying my child has asd and doesn't do this/get away with this, awesome, have a medal. Maybe if the mum here was aware her child
might have something deeper going on, she would be able to find which techniques to best employ to support her child so hers behaved better too? None of you were using now and next or 'pandering' to your children taking as much as they need from home in order to reduce their anxiety and resulting behaviours before you were actually aware there was something more going on were you.
I have two asd children who go to bed and stay there and one who doesn't. They are separate people with different difficulties, needs and anxieties, not one homogeneous asd being who all react the same way to whatever technique/boundary we try 
Yes actually I was doing those things, because she was diagnosed at 3 (she's now 5) and it was very clear from early on that there was something 'not right' with her. She was never like other children, from birth really, her 'needs' were always more. So I adjusted my parenting to allow for it and help her - and I dealt with my fair share of people being critical of me for that. I didn't know that was what I was doing consciously, no, but I did it all the same. Responsive parenting I guess which is sensible whether your child is NT or not. You can only parent the child you have, not the one in 'the books'.
But not 'gentle', not lacking in boundaries and not pandering either! Yes you may have a child with ASD who is more challenging at bedtime, I know of so many parents who have nightmares with sleep. But still, if that was the case, you'd at least warn your friend who you were holidaying with - you wouldn't promise adults only fun evenings knowing your child wasn't capable of achieving that. It so would be madness.
Even with mine being a good sleeper I wouldn't go away with another family without discussion around the fact that my child may react differently to others/need more time to process things/ need me in a different way to how their child needs them. It's common courtesy.
Anyway 'Alyssa' doesn't have SEN so this discussion is rather pointless anyway. She's an indulged child who is playing her mother like a bloody fiddle.