An explicit disinvitation
This was going to be longer but a friend called. Getting back to Red:
“Sorry, that was a rude question.”
Dominic waves dismissively. “I have certain characteristics that you would associate with vampires. As you know, I can compel people. I am stronger and faster than humans and I do not age. While I do not need an invitation to enter a dwelling, an explicit disinvitation makes staying inside…painful, though not impossible. That, however, is true of all creatures from my realm… I was never human.”