Adding weight to a lighter belayer

Thanks everyone! We tried the method of tying into the ground anchor with the other end of the rope to create a dynamic anchor, and it worked well! We had the ATC off of the belay loop and the tie-in through the regular two points. It did rotate her hip into the wall, but it was manageable.

Ground anchor, away from the base of the route, to avoid rock fall danger. Indirect belay allowing about a foot or so movement by the belayer. This is sufficient to absorb most of the impact of a fall.