step-Dad just left town and I as surprised to see that my step-mom, Helena, barely waited a few hours before starting her weeklong party. I was floored when she came out wearing a miniskirt, thigh highs and a shirt i could pretty much see through. When she bent over facing me i could see her boobs and when she bent over in the other direction i could see her thong! She usually dresses modestly, and having her pretty much flashing me when she was putting on her shoes was a stark contrast to her usual reserved behavior. Needless to say, i was not only intrigued but i also had a hard on. I waited up to make sure she made it home ok, and well to hopefully get to see more of what it appears she was showing off to me before she went to the club. She was surprised to see me waiting. I definitely wanted to know for certain if step-Dad said it was OK for her to be going out like this. She was all turned up from her first night out in forever and glazed right past my questioning, engaging me to dance with her. I was so surprised the way she was grabbing at me and trying to be all seductive, i kind of froze in place and sat back down. It took her a minute to realize, but that did not stop her from continuing to try to dance with me in my seat, effectively giving me a lap dance. Grinding her pussy and ass on me, only a thin layer of see through panties between me and her bush...I would have never imagined in a million years that my conservative step-mom would dress like this, go out clubbing like a college student, and come home to end up giving me a lap dance. Am i dreaming?