How long would it take before this became annoying? (please see details)

Assume, for a moment, that this scenario happened. I know for many of you it’s unlikely that it ever would, but play along for sake of argument.

A smiling woman in her late 60s is walking down your street. You’ve never seen her before. She notices you, walks up to your fence and introduces herself. Somehow during the conversation she’s ended up joining you on your front porch with glasses of iced tea. She seems nice enough and you’re happy to have a pleasant new neighbor.

The next day – and every day thereafter – she comes knocking. It might be in the early afternoon, it could be 8:00 AM, but she will come by to chat.

Weekends? Yep. Holidays? Absolutely.

When other members of her family attempt to discourage her from bothering people, she’ll brush it off with “Oh, they’re good people and I love them, in my generation we visited each other all the time. You don’t understand.”

So, assuming you made the mistake of inviting the vampire in, how long would it take before you’d do anything to make her stop showing up?