It wasn't long ago that I started seeing my girlfriend Hailey. We are both 19 years old, but she still lives with her parents and sister. Sometimes I sneak into her room in the evenings and stay the night but she never wants to have sex. I have asked her several times to have sex, but she is being a prude. Then she leaves me in the morning because she needs to go to work. Often I find myself waking up to find everyone else gone except for her beautiful sister. Her sisters name is Kelly. She has long brown hair, what looks like D cup breasts, and a really tight ass. Every morning I walk downstairs and see kelly in the kitchen making breakfast. She always has on a long T-shirt with no bra and pink lace underwear. As I walk out gives me a look almost as if she knows that I am checking her out. Lately it has gotten worse. As I walk out now she will do things like drop stuff and slowly bend over to pick them up. However, yesterday I think I went to far. Haileys parents were out of town so she said I could stay the night, but it would be better if I stayed on the couch because she had to get up early. I layed down on the couch and started to fall asleep when I saw Kelly walk through the door. She still had her T-shirt on and the same lace underwear but when she saw me she quickly covered up as if I hadn't seen her like that before. I took me a while to fall asleep because I couldn't stop thinking about Kelly. I woke up the next morning to Hailey kissing my face and telling me she was going to work. She told me I could stay as long as I wanted since her parents were out. As soon as she left I started to fall asleep again when I heard the floorboards creek. It was Kelly coming into the living room to watch TV. I sat up on the end of the couch. Kelly walked in and sat on the opposite end of the couch as me and then put her feet up so that they were almost touching me. She continued to watch TV but the way she was sitting it was easy to see up her T-shirt and this time she didnt have any underwear on. I couldn't help myself staring at her clit. She could feel my eyes on her body and when she looked down she could see a buldge in my pants. She bit her lip, got up, and started to walk over towards me. She sat down on my lap and i could feel her cheeks cusped tightly around the buldge in my pants. She could feel me shaking slightly and asked if I was okay. I told her I was okay but asked if she was sure she wanted to do this? She said she had lost her virginity a couple weeks ago and wanted to do it again. okay but just this once. then she leaned back on my shoulder letting me see down her T-Shirt and shifted back an fourth moaning softly. I grabbed the bottom of her T-shirt and lifted it over her head. Her tits were amazing. I reached around her waist and grasped her perky tits with both hands squeezing them gently. Then I ran my hands down her body, past her waist. When I got down to her legs I could feel her juices all over her thighs. I slowly ran my hand up until I reached her slippery wet clit. I rubbed it softly at first and she began to moan. The moaning got louder and louder. She stated to climax and I could feel her quivering. As the moans got softer she started to get up. Done so soon I asked? Yes, she said then she walked toward the bathroom to clean herself off. I got up and walked towards the bathroom where I found her sitting on the counter about to clean her juices off her leg. Let me help you with that I said softly as I knelt down to lick her legs nearing closer to her pussy. She braced herself on the counter as I liked my tounge along her clit. Then she rapped her legs around me and pushed my head deeper into her clit with he hands. I lifted her up and brought her back over to the couch where I pulled down my pants. She sat up and I layed down. She slowly spread her legs and sat down on my throbbing cock in the cowgirl position. Thrusting deep inside her tight clit I can feel her body move in sync with mine. The harder I thrust the louder she moans. She tells me to let her know when I am going to cum. I nod and she leans down and puts her tits on my chest and starts to kiss me. I am about to tell her that I am going to shoot my load when I hear the door open. As hailey enters the livingroom I blow my load deep inside Kellys tight wet pussy. Hailey yells and leaves the room and Kelly leans down next to my ear and says thank you. She continues riding my cock making sure all the cum is deep inside her. I was hoping you would cum inside me she says. What do I do now?