Yeah, that was my experience. I had three jobs: walk about a hundred feet, say "Her mother and I," and write checks without your hand shaking because there's a comma in it.

I did find one other thing I could do: resolve arguments between mother and daughter. When they disagreed about some detail, I simply expressed an opinion (didn't matter what the opinion was): that was enough to unite them on the point that I was wrong, and they moved on.