SSNI-845 The sadistic older sister

Today my girlfriend's parents went on a trip, so I had the opportunity to go to my girlfriend's house for the first time. I didn't know she had a sister, so when I passed by her room I accidentally looked inside and saw... a naked man crawling towards her feet, in her hand was a leash tied to her. his neck!!! At that time, I could not imagine that I would also be turned into such a person by her... a toy, a pet of hers!!!