Can't be that exhausting if she decided to have another baby! What a silly decision.
She may have got pregnant accidently, many people do, and been unwilling to have an abortion. Or the dad may have promised to stick around and be in a relationship and changed his mind, leaving her with 2 kids and without his support.
I'm autistic and don't get these parents who keep popping them out and then moaning about it as if it wasn't their choice to add stress to their lives.
Theres no saying this woman is moaning, it's currently her cousin moaning.
Anyway, her poor child. There's no correlation between intelligence and being non-verbal so he's probably got plenty of awareness and many thoughts of his own, but I doubt his mother is giving him the opportunity to learn to communicate by spelling/typing. He'll probably end up stuck in misery with people who think he's stupid because he can't talk.
You doubt that a loving, caring mother, by ops own description, isn't giving this 5yo child opportunities to learn? You have absolutely no basis for that thought, and op doesn't even know what goes on outside of the 4 hours or so month she is there. Op, with all her judgement, doesnt sound like the type of person anyone could approach for advice or with any difficulties, so I imagine theres a lot she doesnt know.
So that poster is correct, you've pretty much made things up to suit whatever your own agenda is.