Just after I had an orgasm during masturbation, there were a few knocks on the door. I was scared and thought it was my parents. I opened...

Just after I had an orgasm during masturbation, there were a few knocks on the door. I was scared and thought it was my parents. I opened the door, but I didn’t see anyone. I saw my panties on the ground, full of liquid. This slutty brother was masturbating with my panties again.