Drew really should have known better about the back of the bus, and particularly about leaving the boys alone in there. I think Aria coped remarkably well in the circumstances. At least he was able to relax and handle the situation when Drew was there which is a lot for him.
As far as Amara's pain medication is concerned, I tend to be on your side. I think, if Amara was at home and resting the lighter pain meds would have been adequate, but they're in the middle of something that is uncomfortable for all of them. Maybe I overexaggerated a bit, but I am a writer after all. I am absolutely not like that in real life. I don't exaggerate at all. Ever. Not even a bit.
Once we're settled with grandma we'll get to know a little bit more about Jay. They're a compelx character.