I Fucked my stepsister in the middle of the night

My stepsister was playing with handcuffs when she locked herself. She asked for my help, and when I opened the door the little devil was wearing a sexy red lingerie, which turned me on. Even knowing that she was my stepsister, I couldn't help myself. The fact is that she was horny too. And as our parents were traveling and very far, nothing could disturb us, and nobody would ever know what happened. I recorded everything, and she agreed to have the video uploaded here, as long as our faces were blurred.