Mark of an Angel(2008)

Elsa Valentin is in the middle of a brutal divorce and custody battle when she is struck by the appearance of a pretty young girl named Lola (Héloïse Cunin). Her interest in the child grows to an obsession, and she finds any possible excuse to be near her. When Lola's mother, Claire, grows unnerved by all this, Elsa admits she believes Lola is her daughter.