Physical Therapy gets physical [MF]

I, [45,M] hurt my knee at work and have been going to physical therapy 3 times a week. My doc went on vacation and had told me to expect a sub for the week while he was away. Being a perv, I was really hoping for a hot female physical therapist who was fresh out of college. Monday was a dude, Wednesday was the same dude. Friday I show up and the receptionist says, the physical therapist isn’t here yet, but should be here soon. So I’m waiting like 15 minutes past my appointment time and I’m getting a little annoyed. But soon enough a tall (5’10”) blonde woman, in her mid 30’s opens the door and says Hi, I’m Courtney, I’ll be working with you today, sorry for being late, I’m from out of town and I can’t find anything. I say it’s no problem and I go to the bike where we always start. I notice that she has very long slender legs and a great ass underneath her faded blue scrubs. She’s wearing a puffy jacket zipped up and I can’t check out the tits, but she overall she was pretty, not a knockout but attractive. We chat a bit while I’m doing the stretches and exercises and she seems really nice, fun and flirty.