To end up not knowing normally / To end up not knowing about it in the usual way / To just not know and leave it at that

Melinda, as a merchant's daughter, devotes herself to business today as well. Today's customer praises Melinda's hair, so she recommends products to keep hair beautiful. The customer purchases hair dye powder because they want to dye their hair Melinda's color. With such simple happiness, she listens to her lover Neil's work concerns...