My friend was acting defensive when I told about one of her friends, why?

[Believer]

I was scrolling through my facebook homepage, and I saw that my friend had commented on a picture of one of her friend's. It was a picture of a letter from a poetry contest that I had entered. It was a scam, fake, or something, but they wanted a lot of money for the book and other things. I told my friend, to tell her friend, to warn her before she paid the money(I didn't pay the money). She got defensive, saying that it was her friend's choice, and the she wasn't getting in it. She said she was proud of her, and I told her that I wasn't jealous of her. I mean, I entered in the same contest and got a letter, I wouldn't be jealous.

Why was she acting so defensive about it? I was trying to help her friend, not hurt her. I don't want someone to make the mistake of spending the 50-60 dollars on a book.

[Cierra Groves]

She probably got defensive because its her friend and also idk maybe she was mad and had a bad day it happenes with me and my friends all the time I will be like hey worning u it may be fake n she will be like well who cares cuz if its real its in ur face hahah n I wil be.like well im just trying to be a good.friend but watevs if I was u explain to her hey I was just looking out for her and then maybe she will apoligize . Good luck I hope everything gets better