Home alone with the girls when a stranger knocked on the window asking to be let in

I’m home alone with the girls and I hear a knock on the window. When I go check, it’s a random girl, and she asked me to open the door. I asked what she wanted and asked about some wood my landlords have in the front yard. She got upset because I didn’t open the door. Lol I don’t care what she wanted, I don’t care that she was a female, I’m not opening my door to anyone I don’t know!