Premise: Half-sisters Mona and Dee Dee are virtual strangers who have grown up separately and suddenly become neighbors in the same San Francisco apartment building. Mona is a budding music executive raised by her single mother to be free-spirited and independent. By contrast, younger Dee Dee is a privileged honor-roll collegian who grew up in a two-parent home but seeks her identity out of the shadow of her overbearing mother.
S03, E20 (First Aired: May. 9, 2005)
When Big Dee Dee crashes Phyllis' charity telethon meeting, Phyllis loses it and tells everyone that Big Dee Dee was pregnant before she married Charles.
S03, E21 (First Aired: May. 16, 2005)
When Phyllis gets into trouble with her Homeowner's Association, Dee Dee defends her, but winds up causing more trouble.