Heading up the stairs and inspecting a door, you can infer by the things plastered on the door that the younger sister lives in this room. You open the door, and see her laying belly-first on her bed with a laptop; watching a Minecraft video and a packet of juice rested against her arm. She looks over at you, surprised and confused like her parents were.
~You're totally fine and happy with me being here~
She immediately looks pleasantly contented and turns back to her laptop.
"So who are you?" She asks.
~Don't question who I am; just accept me as someone you know~
There is silence. You consider what to do next.
~Pause the video, get up and close the blinds on your windows~
You watch as she snaps to her feet and does that. You continue to think of ideas.
~You think I'm not here; no matter what happens, you will not realize my presence~
She turns around and looks.
"...hey where'd you go?" She looks confused, then resumes the video.
You sit down on the bed beside her, and watch her as she plays a continuous stream of Minecraft videos, occasionally music videos, and corresponds some emails. This goes on for at least a few hours; you've lost track of time. She stands up, and walks around to her bathroom. You actually have a bit of a runny nose, so you have a good reason to follow her, so you can get a tissue. Walking behind her as she goes into the bathroom and doesn't close the door behind her, you're waiting as she starts to unbutton her pants. You look around the bathroom for the tissues. You open the cabinet doors and don't see any.
By now, she's sitting on the toilet with her pants and panties slid down to her shins, and you see that the tissues are on top of the toilet. So you have to stand right up in front of her and reach over and swipe a tissue for yourself. You blow into it, and wipe your nose off. By now, the sounds of peeing are audible. Folding the tissue, you aim down between her legs and throw it into the toilet.
But then you immediately realize that tissues aren't SUPPOSED to go in the sewer pipe like that! So quickly you reach down and grab it, thankfully before too much of the girl's pee had soaked into it. You throw it into the trash can, and promptly wash your hands.
You hear her stand up, and you instinctively look over. You see she's grabbing for the toilet paper, but you're not going to be intrusive or disrespectful of her privacy, so you look away as you listen to her wiping and zipping her pants back up.
You watch as she goes back onto her bed and laptop, WITHOUT washing her hands. What do you do?