My girlfriend was a wild thing. She was fairly small at 5' 2" but that didn't stop being a big part of everyone's life that she touched. To say she was outgoing was an understatement, at twenty seven she had far more energy than what I had. I ran a youth group on Friday nights and Rana would help out. Then one Friday I was unable to get there due to a work issue. Rana offered to run it on her own. I thought it was a good idea instead of cancelling the evening for the teenagers. As some of the older lads could be a handful I asked a mate to help. He jumped at the offer of help saying he could handle anything they could throw at him. Then the work issue sorted itself out and I thought that even if I couldn't get to the evening I would be able to meet Rana and take her home. As I drove up to the hall the outside lights were still on. Good I thought, I was in time to take Rana home. As I entered the hall I couldn't see anyone and made my way towards the office. That's when I heard the unmistakable sounds of a couple making love. The grunts and groans were loud and getting louder as I got closer to the office. I thought it would be a couple of the older teenagers. Then as I opened the office door I had a great shock. Rana was bent over the desk and my so called mate was pounding into her pussy. For a few seconds they didn't know I was there. Ray was slamming away when he suddenly saw me and hastily pulled his cock out and ran out the office still trying to put his cock away. Rana looked around to see what had happened to Ray and tried to stand up. I was too quick for her and pinned her back down on the desk. Next to her was a pair of table tennis bats. I grabbed one and started to paddle her arse with the bat. As I rained blows on her arse she squealed and yelped with each blow. Then she was shaking. My dirty slutty girlfriend was coming as I paddled her. Then I noticed that my cock was getting stiffer and stiffer with each blow. Rana was no longer trying to get up from the desk. I stepped back and took my hard cock out and as I did I took in the sight of Rana's wet pussy and her panties still around her knees. I slammed my cock into her pussy as hard as I could. I continued with blows on her arse, but now from my hands. Then Rana came violently as she shook and tried to get away. I pinned her tight to the desk again and continued to fuck her until her orgasm subsided. Then I pulled my cock from her pussy and took aim and slid about half into her arse. Something she had always denied me. She wailed as it penetrated her arse, but I told her if she wanted to be a slutty tart she would have to just take it and pumped it deeper and deeper until it was fully home. She had gotten used to it, and the wails had developed into moans of a woman enjoying a good fucking. I pounded her arse until I came. I withdrew my cock to the sound of a plop as I slipped out followed by a long wet fart. Then she was pulling up her panties over her red arse cheeks. Once home Rana went and showered and then was about to get into bed when I grabbed her and examined the red marks on her arse. I gave her one small smack on her arse and she shuddered through another orgasm. Her orgasms could be triggered by slapping and paddling her arse. Since that night Rana has enjoyed many paddling s and smacks on her arse along with getting arse fucked. Ray has kept well clear of me since that night. Secretly I would have liked to thank him for opening up Rana to a much more adventurous sex life. The desk at the youth club has seen a fair bit of action since that night. I have told Rana that when I am ready she will be shared with another man. I'm now looking for someone who wants to smack and fuck Rana's arse.