I have learned to tell the little parts that the adults are going to be doing safe, adult things with H and suggest that they tuck themselves away in their safe place for a while. For me, this is a bear cave with a protective and warm mama bear and cuddly bear cubs. So I imagine them (the little parts) going there, entering, snuggling in.
As I have continued in therapy, I have found that this sort of "tucking in" is helpful in other situations that I want an adult part to handle, such as conflict. My Ts are all in favor of this technique.