Is it in invasion of privacy if I have thoughts of looking in my friends underwear drawer?

So, interesting situation. Long story short, since July we have the daughter of a family friend live with us. It is actually more the friends cousins boyfriends daughter (hope that isn't confusing, but mainly, someone we don't exactly know that well directly).

Looking at it, I feel her dad and his girlfriend sorta left her here with us. Since then her and I became friends, albeit she doesn't really speak English.

I feel really bad for her that she is alone, and her dad lives in the city 2 hours away and doesn't come to visit her.

I actually do find her attractive and really do like her. Her dad is suppose to pick her up Wednesday-Thursday to take her to the city because she has to do some important thjngs (i think otherwise he would still never visit her but he has no choice since it is important).

With that being said, i have had the thought of going into her room and having a quick peek at her underwear, mainly her bras so I can get an idea of how big her boobs are. However, I just feel terrible thinking this way and that I am taking away her privacy.

She is more or less part of my family and she feels happy and comfortable here. She also told me a few days ago that she would like to stay with us for a few years and doesn't want to live with her dad. She wants to make her own choices. I don't think her dad is a great father, nor do I have a good opinion of him, but that is just my opinion.

It is just I had the idea of peeping while she was away and it makes me feel terrible if I am taking away her privacy, and her trust.

Is it in invasion of privacy if I have thoughts of looking in my friends underwear drawer?
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