Seriously, she really loves the guy. Flat out loves him. She drags Sylvia up to our tennis courts if Sylvia tells her we’re playing there, and when she arrives, she does the terrier equivalent of throwing her arms around his neck.
Then she grabs a tennis ball and asks him to play chase with her. End of lesson, basically.
As you can see… (thanks to @gingerkid91 for taking the video on her IPhone).