She doesn't need help with that, he can see that, but they can both get something out of pretending that she does. "Here." He hands the gun to her, muzzle pointed safely away from them both, and steps in close.

"Like this," he says, placing his hands in various places to direct her how to stand to take aim.

He might also be smelling her hair, because it's right in front of him. One of the advantages of her being as tall as he is.