Would it be wrong if I downloaded polybuzz just to spy on my sister?

The title sounds weird but trust me I have a very good reason to do so because uh— my sister isn’t even 13 yet. She’s that young and going on polybuzz.

And the thing is, she’s changed a lot. Like I would randomly go up to her room (she just stays upstairs in her room all day now) and she would instantly hug the iPad to her chest and get all protective of it. I would ask her “whatcha doing?” And she would be like “GET THE [] OUT OF MY ROOM, YOU []” even though I literally didn’t do anything

Anyways uh yeah should I? I’m planning on forcing the iPad to log onto a throwaway account and just see what she’s doing on there all day.