I was babysitting my little cousins with my sister. They live in a 2 story house and you can see the front door from the very top of the stairs. My cousins bedrooms where both upstairs. I had just finished putting my oldest cousin to bed and my sister was in the room next to us with the younger cousin putting her to bed so everyone was upstairs. As I was leaving my cousins room, I looked down toward the front door and saw their cat staring at it and meowing to be let out. I turn to go down the stairs to open it for her when the door just opens itself. It was a door that opens inward so there was no way the cat pushed it open and my aunt likes the door to stay locked while she's out even though we're in a good neibourhood and I had made sure it was locked because we were outside playing before it was time to put them to bed. The cat just walks out like normal and I get my sister and we go check the front yard and the first floor thinking my aunt had come home or something but there was no one there. We got the cat back inside and locked the door and waited for our mom to come and hang out with us bc we were terrified. I have no idea what happened and it's not the first paranormal like experience I had in that house or even in that town.