I know everybody think that the girl who plays Lily is Barbara`s (Deb) daughter, but this is not true..
Lily Roe Scott is played by Mary Kate Englehardt, Barbara dont have a daughter named that! BUT Barbara`s daughter, Natalie Alyn Lind, played the little girl, Alicia, of the two kids that Haley babysat on episode 4.07...

Just wanted you all to know ;)