Chloe asks Will, who had by then accepted the fact that he was Peter Ward, if he still sees his children. Will says yes, and Chloe asks him to tell them that she misses them.
Will's final goodbye to his deceased family. Finally knowing it was not him that killed them, and putting his guilt and shame to rest, and getting the closure he needed to get on with his life. A Tear Jerker double whammy.
Any time Will is with his family, for the first half of the movie. This all becomes a Tear Jerker when we find out what really happened to them, but it also drives in how much he really loved them.