Heidi didn't follow Monty when he backed away from them, just gave Gabriel a tighter squeeze.
"I don't know about 'new father'. Your father's still ... here." If not necessarily as present, but she'd keep her feelings about that to herself -- it was more or less the agreement that they'd decided to have in this place.
She sighed quietly, though. "So I suppose you could try calling him 'Gabriel'."