Maybe God's using Reilly to teach "Momma" about patience—or resignation. For example, "Momma" didn't tell someone to stop annoying & loud whistling when she could have told her—and she said that she was "surprised that ["Momma"] didn't tell [her] to shut up"—and "Momma" herself just shut up as this person was whistling.
Meanwhile, "Momma" dealt with this contentious person earlier and saw how the contentiousness affected Reilly—poor, patient, unhappy Reilly—maybe at a subconscious level, "Momma" learned and later applied the lesson that she learned (or relearned at least) from Reilly—i.e., all that you can do in some cases is nothing but pray and otherwise shut up about it, especially if you've tried multiple times to reason with the contentious party or parties.
Reilly clearly got that this person can be contentious and wished that "Momma" wouldn't have to deal with when this person gets contentious—"Momma" could see that on Ri's face!
Meanwhile, "Momma" dealt with this contentious person earlier and saw how the contentiousness affected Reilly—poor, patient, unhappy Reilly—maybe at a subconscious level, "Momma" learned and later applied the lesson that she learned (or relearned at least) from Reilly—i.e., all that you can do in some cases is nothing but pray and otherwise shut up about it, especially if you've tried multiple times to reason with the contentious party or parties.
Reilly clearly got that this person can be contentious and wished that "Momma" wouldn't have to deal with when this person gets contentious—"Momma" could see that on Ri's face!