Not only did they get their son's life saved by a member of the royal family, but they also got paid for nursing the child, and they got to keep him in their own house. Did you notice that? She sent him away with her until probably he was weaned. It could have been a couple of years that he was living in his own family's house during those very important formative years. He was a Hebrew living as a Hebrew, and his parents were righteous. It says in Hebrews 11 that they were faithful. "By faith Moses, when he was born, was hidden three months by his parents" (Hebrews 11:23). He was in good hands. Notice God working this out, making all the details fit.
No significant commentary.