While you were snooping around your sister's room, you realized that she took your MP3 player from you, and didn't give it back, that was until you find it laying next to the desk that had her computer on it, and decide to take it back. Luckily, you scrolled through to find out that she didn't remove any songs from it.
Just then, you took a peek at what was in your sisters closet, because you discovered that she just added doors to it, despite closets themselves not having doors that could keep you from seeing what kind of clothes another person has. You also saw that your older sister keeps the key to the closet hanging around the knob. Before you decide to unlock it, you checked to see if it was actually locked, so you turned the knob a couple of times, and it was locked which made you unlock the doors.