My husband's brother and his wife are exactly the same. It's obvious that their daughter has something going on. I suspect she may be autistic or have Aspergers. Their cousin's little girl has been diagnosed with Aspergers and she's doing great. They've worked so hard with her. Their cousin politely attempted to say to them that perhaps their daughter may have similar and got the nose bitten off him for his concern.
It's completely unfair on the poor child that they refuse to acknowledge that anything is wrong, because the longer it's left, the harder it's going to be for her.
It seems to be the same for Ronnie. I'm not saying that there's definitely something wrong, but they're definitely hindering his development.