My step-son has a really sweet girlfriend, and my wife and I really like her a lot. They have plans to get married after school, so we decided to let her stay with our family so they can save money while they attend the local college. His girlfriend is quite a catch, and we both know that our step-son would have a hard time finding a better girl. The only downside to letting her live her is that sometimes we hear them having sex in our step-son's bedroom. I personally don't mind hearing them, but unfortunately it does make it a little uncomfortable, especially when they seem to be having a lot more fun in bed then my wife and I. I remember the days when we were in our twenties and humped like rabbits any chance we got. The other day at dinner, I happened to make a little joke about the noises we sometimes here, and couldn't help but lament that I missed those days. My wife shot me a look, but I think I saw a look of pity cross the young girl's face. The other day, while my wife and step-son were away, his girlfriend came to me to thank me for letting her stay with us while she was going to school. I told her we were happy to help, and considered her part of the family. Then, she mentioned how she felt sorry for me because it seemed that my wife wasn't taking care of me the way she took care of my step-son. She looked up at me with her beautiful brown eyes and said that she wanted to really "thank me", by doing something for me that my wife probably no longer did. She told me that she wanted to give me a handjob! I felt my cock stiffen in my pants as this young beauty told me to lay down on our bed and she would take care of me. I nervously lay down and let my future step-daughter-in-law run her hands over the front of my pants, feeling my hard-on with each pass of her palm. She unzipped my pants and my cock sprang to attention. She took my stiff cock in her hand and spit on it to make it slippery. Then she began to slide her hand up and down the rigid pole. She complimented me on the size of my cock and said, "like step-father like step-son, the apple doesn't fall far from the tree, does it?" I couldn't believe she was comparing my cock to my step-son's! She took off her top and revealed a pair of tight young tits, which were so much perkier than my wife's. Her long soft hair brushed against my thigh as she continued to make my cock feel loved. "This is the least I can do to repay you", she said. Next, she took off her panties and let me see her pussy. "This is the pussy your step-son gets to fuck every night", she said. "My pussy is getting wet for you. It's a shame I can't just slide on this cock". I stared at her tight young pussy while she milked my rod. Then she really blew my mind when she started to call me Step-Daddy! "Are you going to cum for me Step-Daddy?" she asked, as she started to pump her hand up and down faster. Suddenly, I felt a huge load burst from the tip of my cock and cover her hand. "You do shoot a big load like your step-son. I guess it runs in the family". I couldn't believe that I let my step-son's girlfriend jerk me off. "We can do this again, any time you want", she said. I think she is going to become an interesting addition to our family. Starring: Abbey Cross