In season two Lila is married to Stefano and becomes Raffaella (Lila) Carracci.

What happened to Lila in my brilliant friend?

Elena’s childhood friend Lila (a nickname for “Raffaella”) has disappeared, and her son is unable to find her. Elena recognizes this behavior as something Lila, in her later years, has always talked about doing, and believes her disappearance to be a conscious decision.

Why does Lila disappear?

For arbitrary and ordinary reasons, Lila (like nearly every other person from their neighborhood, like most people everywhere) does not become a part of this elite. She struggles on the margins of Elena’s life, and then she disappears entirely.