Ben had said the same thing, in so much more gentle words. That Klaus had always wanted to be normal, and grieving was part of it. That he needs to let go, to try and mourn and move on. To say his piece about the man he loved, the man he lost, and not let his absence continue to burn like a bullet wound in his heart.

He opens his mouth to say something- to argue about Allison, and how he's only trying to say that they fight. To argue about his friends, and how Cassidy actually steers him away from the hard shit, reminds him that he's supposed to be keeping off of it.

But Mom? Mom being here?
He can't let that go. And he finds himself gulping for air, swallowing down his regrets that he didn't help Diego dig her out, that he gave her up so soon.
"... Mom was here?"