They talk over Skype, swap recipes and share relationship advice via email. No, they aren't pen pals -- Talyaa and Serena Liera are mother and daughter, living 2,800 miles apart. Talyaa Liera is a noncustodial mother – a mother without physical custody of her children. While she lives in Seattle, her three children live with their father in Pennsylvania. Watch the full story on "20/20: With Parents Like These" TONIGHT at 10 ET.