To me, the trader was to strict in protecting her business if that's what she was doing. 50 naira is a small money that she could use to test your level of trustworthiness. But then, like you said, she has the right to do what she did and you have the right to get your 100 also.
Exactly, she did what she had to, and I don't hold it against her. I also did what I had to do as well.
Well, it's all in the past now.