So effectively this child is being kept "housebound" unnecessarily by an over-protective (anxious?) mother. Not a great leap to conclude this from what has been said, unfortunately.
OK but housebound from ME is one thing, housebound from an overprotective mother is another, and an overprotective mother playing a causal role in ME is yet another.
It is the latter leap I was referring to.
( which is where I though you were going with the analogy to autism)