We both chuckled as I pushed her up against the door, the laughter turning into hot steamy kisses. My hands slid down to her ass, squeezing it firmly,...my cock grinding hard against her mound. Her nimble fingers quickly pulled my tie off and began to unbutton my shirt. Her hands slid inside, her fingers roaming all over my chest. As I lifted her, her long legs instinctively wrapped around my waist and I carried her easily over to the vanity, sitting her down gently on the cold granite. I sucked. But it made me start looking at her in a different way, I started looking at her tits and looking up her skirt where possible, and being that age I kept getting embarrassing erections that I did my best to hide.She caught me masturbating several times in my room and told me to stop it at once as it was "dirty".At first I almost died of shame but later on started getting angry.I wasn't hurting anyone, it was perfectly normal and it was none of her business. I decided to get my own back, and get. Her mouth came to my ear. "My slut," she said, "Remember that I owed you a punishment?" I shook my head, saying into the gag... No, no."Yes," she said. "You are going to receive twenty strokes. And there is nothing you can do to prevent this. Understand?"I heard the swish of the riding crop, as Mistress struck the bed beside me. I jumped. Oh no.Mistress started gently enough. A couple of swats on my bottom, probably even on my panties or skirt. Then she lifted the skirt further up, and pulled. We were wearing our new night-vision goggles that Mr. Higgins had gotten for us. They were the latest design for military use, and I don't want to know what favors that he had called in for them to show up, but we had three pairs. We were also assured that we could have more if they were ever needed. Anyway, we found the darkest place at the castle wall to do our climbing. I had a spring-loaded launcher that could throw the grappling hook up 40 feet if that were necessary. I set it for 18 feet.