To come to terms with something means to eventually accept and be okay with a difficult situation.
Come to terms with something意思是最终可以接受困难的处境。
Before you come to terms with the situation, you might feel angry, disappointed, frustrated, etc. (et cetera))but after you come to terms with the situation, you feel calmer because you have accepted the reality.
在你come to terms with这件事之前,你可能会感到愤怒、失望、沮丧等等,但是当你come to terms with这件事之后,你会感到更加平静,因为你已经接受了现实。
Ben and Lily have come to terms with the fact that they will never have children.