It's Locked

The back door had a faulty latch... and often locked itself when the door closed hard. A fact Steph forgot when she went outside... For a moment she begins to panic, She is locked out... fully naked... and has no way to contact anyone... nor does she know when her housemates might come home.

Then it clicks... there's a spare key. In the front of the house... The owner keeps one under a fake rock for emergencies... he mentioned it when she moved in, but... he never said which rock it was...but that's her only chance to get back inside relatively unseen.