"Okay. This one goes here." He said, while taking one of her hands in his. He motioned to her other hand, then, and gestured towards his arm. "When I put my other hand on you, you put that hand on my arm here. Then we just... move to the music. I lead us a step one way, and you follow."
After a pause he added, "Or you can lead us a step and I'll follow. I'm okay with that."