Room for Two - Season 1 Episode 5 Private Parts

Edie's been acting mysteriously cheerful, which leads Jill to suspect that she's sleeping with Ken. So when her mother's mood takes a sudden nosedive, Jill does what any child would do -- she confronts Ken, unaware that there's nothing going on between them. In the meantime, Jill herself is depressed that she has to attend a friend's wedding with no date.