Given Virgie Mae's exchange with Estevan at dinner in Chapter 7, what is ironic about this revelation?

The relationship between Virgie Mae Parsons and Edna Poppy becomes clear in this chapter. While it was previously a mystery why Edna would tolerate the rude Virgie Mae, the relationship becomes evident when Lou Ann and Taylor realize that Edna is blind; Virgie Mae is the caretaker for Edna Poppy. This revelation softens the harsh character of Virgie Mae; while still rude and judgmental, she is still capable of great care and kindness.