Girls, Why would my female friend purposely stick her ass in my face?

Anonymous
We were helping clean out a house for charity. We were working in a cramped kitchen. She was holding the bag and I was grabbing the bug infested junk. Another girl came in and started cleaning behind me. My freind turned but she turned and stood in a weird spot to collect trash in. The diagram shows her position. Essentially every time I had to throw something away. I had to look at her ass. 2 minutes in I noticed that she was not in the best position either for the other girl to collect trash.
Girls, Why would my female friend purposely stick her ass in my face?
I wanted to say something but I was not sure how to ask her to get her but out of the way and to put the trash bag where both of us can easily reach it. Without sounding mean. Girls why would she do that? She could have easily backed up and held the bag in a way that both of us could have easily reached it. Like so.
Girls, Why would my female friend purposely stick her ass in my face?
Updates
+1 y
Because a bunch of people don't seem to understand the diagram let me explain it. I am the green dot. How much I have to turn around to throw away trash is the dark green arrow. My female friend who has her ass in my face is light blue. The way she is facing is a darker light blue. The others friend is purple and how much she has to turn around for trash is dark purple arrow.
Updates
+1 y
Well I guess she is trying to flirt. I was watching the game with her and a few friends. She was on the couch eating hot wings. I was sitting somewhat behind her munching on mine with 2 of my mates. She got up and got a drink and to wash her hands. She comes back stopped in front of me bent over the couch showing me her ass during which gave her brother a drink and some napkins. Then went and sat back down right next to him.
Girls, Why would my female friend purposely stick her ass in my face?
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