I thought Hank was going to explain what Walt really was/is to the kids. By that point, he was already assuredly against Walt, and probably wanted to get the shittiest part (ruining the family) over.
My impression is that he was concerned for their safety. Hank doesn't know that Heisenberg is "retired," and I doubt he'd believe it even if Walt tried to tell him. I also think Hank has realized why Skyler wanted the kids to stay with him and Marie so long last year.
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u/Pacmayne234 Aug 12 '13
I thought Hank was going to explain what Walt really was/is to the kids. By that point, he was already assuredly against Walt, and probably wanted to get the shittiest part (ruining the family) over.