Sarah is sad and lonely, and Alex should keep her with them, but he needs a moment. With ED-E's consent--and damn did his kid get protective of Neil the past few days--Alex is left with what he wanted.

What he's always wanted, for the past four years.

They'll catch up soon enough, one way or the other. For the time being, Alex reaches up to pet through Neil's hair, kissing his forehead. Nothing further.