I’ve been trying to track down this book for a couple of decades. All I remember was it was a paperback published sometime in the 1970s or 1980s, the narrator was a teen girl and she had a brother who was around preschool age and disabled. The brother would regularly have physical therapy sessions in their home. I only remember one quote, when the brother said something like “my damned fingers won’t/don’t work” and the sister tells him “you shouldn’t say damn.” Suggestion: A Boy Called Hopeless By MJ By David Melton