If this were almost any other house she could check the local footage reel for the last few hours and see whether anyone has even approached the place. She considers going out into the street and doing exactly that, but if she does and there is something here that someone wants, or wants her not to have, she will have lost it. Likewise if she summons backup. She could try opening a window and leaning out. Her mind pictures this undignified and tactically disadvantageous solution and she rejects it.