Jan was too self-involved

When Bobby and Tracy come home to announce their engagement Carol answers the phone and it's Jan. Jan tells Carol her and Phillip adopted a little girl. Carol tells Jan to bring her to the wedding. Carol tells Jan to bring her to the wedding. Jan said Peter set the date then Carol tells her no Bobby. Gee, how long did it take Jan to know Peter broke his engagement with Valérie? Some people are too self-involved they don't know these things.