Have you looked over the many animated illustrations on the site's Home Page? If not, please do.

My first thought is the "X" or "Y" positions in which the two recline facing each other. The difference between the two is with the position of the legs.

Depending upon her ability to be comfortable, another suggestion is for her to recline on the bed face up with her legs dangling of the edge/side of the mattress. The man stands in front and between her legs.