You have to stop being nervous, she knows she can intimidate you and she will. What I had my friend that was going to pet sit do was wear thick heavy clothing and my leather work gloves. I told her walk in like you own the place do not look or speak to my dogs walk to the cabinet and tell them to sit and give them a cookie. She did most of what I told her and didn't have a problem.
Can you do some fun stuff with her? Walks, play or some favorite treats.
Apache - Shiloh Shepherd 12/15/02
Kiya - Shiloh Shepherd 5/15/04
Lakota - WGSD 1/13/10