If I remember rightly the two mothers Maybelle Carter and Carrie Cash have a brief conversation about music at the dinner table when Johnny buys the new house?
June talking to the shopkeeper wouldn't count as that female character is unnammed is not named
June Carter has a longer conversation with someone working in the shop, but it pertains to her failed marriage to a man.
Two mothers attempt to cover an awkward moment (between a son and a father) at the dinner table by discussing their sons.