| Mary's Second Child |
Real Identity: Unknown
| Mary Drake (Biological Mother) |
Charlotte DiLaurentis (Sister)
Kenneth DiLaurentis (Uncle)
Jessica DiLaurentis (Aunt; deceased)
Jason DiLaurentis (Cousin)
Alison DiLaurentis (Cousin)
| The Liars (assumed) |
| - Is Mary Drake's Biological Child (exposed to the Liars) |
In "Original G'A'ngsters", the Liars found out via a file that Mary Drake gave birth to two children: Charlotte and another baby. The gender of this baby is unknown, but the file states that this sibling is the age of the Liars.
It is unknown who the father is, though there is a chance they share the same father with Charlotte.