Why did she sit her personal belongings by me?

Just little background. I have a female coworker whom I’ve gotten pretty close to I’ve. Notice the usual signs of attraction but she did something out of the norm today she left out the office and puts her vest and on a chair that was sitting on my side of the office usually she’s hangs her clothing on the back of her computer chair. Even when she came back into the office she left the vest in the chair on my side. I just thought it was weird that she sat it by me didn’t say a word when she did it either. I’m not trying to make something out of nothing just thought it was weird given that she usually keeps he belongings close by her. Maybe it didn’t fit on the chair I don’t know but this wasn’t the first time she wore a vest in the office either.
Why did she sit her personal belongings by me?
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