Eliza has a real deep-seated need. She wants a baby, but not a regular one, but an adult baby. And not just a roleplayer but one who would live as a baby fully all the time.
Eliza's mother not only understood this need but also felt it in part herself, as she wanted a grandchild whom she could love and cherish.
Together, they set out to find the perfect baby for Eliza and, on the way, discovered that her heart was big-very big-and maybe one was not enough.