but what happened to Lila?

From Trashionista: Francine Pascal is expected to release an adult Sweet Valley next spring.

Description:

Now with this striking new adult novel from author and creator Francine Pascal, millions of devoted fans can finally return to the idyllic Sweet Valley, home of the phenomenally successful book series and franchise. Iconic and beloved identical twins Jessica and Elizabeth Wakefield are back and all grown up, dealing with the complicated adult world of love, careers, betrayal, and sisterhood.