My excitement was mounting, and the prospect of an orgasm was not out of reach. I lay for a while with my legs spread, relaxed, enjoying my strange p...edicament. Suddenly I was abruptly surprised, as something forced it’s way into my vaginal cavity. It felt much larger than a finger! It completely filled me and instantly, savagely, began fucking me. It slid in and out in and out of my wet muffin. I was startled, still afraid to open my eyes. Nothing even remotely like this had ever. “My mum would go mad if she found that.” I thought to myself. I put the tissues in the bin and unlocked my door, I crept across the corridor and peered into my sister’s room, it was empty. I sneaked inside and walked over to her underwear drawer. What I was about to do was so wrong, yet I wanted it so badly. I pulled the drawer open and rifled through the drawer aiming to select the sexiest pair of underwear I could find.I moved a pile of underwear aside and to my horror, underneath I found. I watched as she pulled the poppers open and gently massaged her inner thighs, moving her fingers slowly over her labia and up. I watched for a few seconds as she slowly played with her pussy. I pulled the car away onto the street and headed in the general direction of home, but taking a very indirect route. "Anywhere in particular?" I asked, glancing down at her increased playing. "I think you know where we should try," she murmured. Instantly I realised that in her very tipsy state she wanted. I finally switched the machine off, stuffed it in my bag and dashed from the house. As I sat in the taxi I could feel the wetness of my panties between my legs. I felt like such a slut but at least I was on my way.++++++++++++I tried to concentrate on the report before me. It was some long and quite complex report and forecast of the next three years of the company. I knew it was important which is why I had left work early to take it home to study over the weekend. I turned over to the next.