The person who commented on Abbies hunch is right...of course Asa has a childish comeback. Poor posture is common with those on the spectrum yes.
That being said..it's been addressed by professionals and there are things to help...like cross. Straps, light weight, easy to use as well as as various compression garments to help gently keep the shoulders back...my son has used both on and off an hour or two through the day..helps with muscle memory etc...which helps him feel stable, walk better, keep his alignment strong...it effects their walk their gaite....it's extremely important!
The fact Asa...does nothing to help Abbie with this is mind blowing. The fact is if he doesn't help her to rectify it...it's going to cause SERIOUS long term life long issues and hinder her mobilty ....it's something that medically required attention.
Kyphosis is what the arches hunched over curving spine is called...and yes ASA.. It needs to be addressed before you cripple this kid....open your eyes man...is there anyone in that family that gives a tit about this girl???
But yes teach her the word horse and teach her to wrestle because THAT'S improving her life.