Why is she mad???

Angie • I'm a feminist/ally/cat lady/theatre geek/Disney child/thalassophile who is in love with her bf❤
I came home yesterday for Thanksgiving and my mom had gone through my old room and found one of my old purses. Inside of it was an unused condom. She got mad at me because I had a condom in it. I told her it was an old purse and she left it alone. Why would she get mad that I was practicing safe sex??????? It annoys me.