"Are you in the room with anyone else?" "No I'm just in the cellar, why?" "Listen very carefully and do not speak unless I ask you a question. When yo... do speak you must refer to me as sir." "...Yes sir," I could hear she was already slightly aroused. She knew I had something planned. "Tonight I will be at your front door at 7:30 exactly. Before I arrive I expect you to have showered and be wearing some nice perfume. You will open the door and will then, without saying a word, go into the. There is the more familiar "Tardis" - The Police Box that is used in the "Dr Who" TV Series etc.Well a Gropebox is usually very very similar is size & shape to something like that, but the difference being that the Gropebox has a number of Holes placed at different levels and places all over the box; and the holes are of course big enough for someone to get their hands etc. through.The idea then is that 1 person then enters the box (naked usually of course) and as it is a fairly simple enclosed. John saw that there were many bikers arrived and told his Biker slut she was going to enjoy because there were a lot of Bikers coming.She gave no attention to it because she was getting fucked hard by a couple of Bikers while she was sucking the other Bikers. After a few minutes she was at the center of more than 50 bikers and 1 for 1 they pulled their dicks and sprayed their sperm over her while other Bikers fucked her and filled her with their cum.John saw that two blacks arrived and motioned. I didn't know how much I missed her until I heard her laughter. Before I realized what I was doing, I burst through the door full of excitement. I couldn't wait to see her smile. But all I saw was her kissing my sister.I just stood there confused, embarrassed, and shocked. I could feel the heat overcome my body and then cooling, like unexpected rain on a sunny day. My sister let out a squeak and sat straight up as if I had caught her with her hand in the cookie jar, or more like I witnessed her.