Thinking about it, the cats grew up with Sharon which made a difference. This sitter would need to spend more time at your house getting them used to her. I feel for you.
Our difficult grand dog has a neighbor he likes that goes in and walks him when Craig can't. The neighbor will be watching Yogi when Craig is at the wedding in Cozumel.

It's nice to have good neighbor's. Craig & Yogi have spent most of the day next door watching a BATMAN (C. Bale) marathon. Craig called after a break to walk Yogi, feed & spend time with Kitty, and to cook dinner. The neighbor is recovering from a hernia operation so Craig has been helping him out. He will take dinner next door to eat while they watch the last movie.