"Hi Suomynona,
/* the lady probably will need to turn slightly more than the man does slightly sooner. He will then catch up with her. */
I get a picture of a book opening and closing. Is that what you intended to convey?"
Yes, but very, very slightly.
The man shouldn't be pushing the lady open, nor should she be opening in anticipation. She should be opening to match his rotation as it evolves, only a small amount more so to insure that he doesn't physically collide with her. This is something non-contact couples are fairly sensitive to, which most depend-on-contact couples miss entirely.