I finally gave in later today, and left the back patio door open just a little. It was quite a bit warmer today. First, there's Dylan coming out again after being in and out purreviously! Then, Domino decided to act as a door stop! She stopped Dylan from getting in!!!
In the picture showing the back of Dylan's head, you can see Domino starting to raise her paw to him.
After he finally went away, she stays in place a good long time deciding whether to grace the outdoors with her formidable purresence!