I made the decision that this was a perfect time to see just how submissive my step mother might be.With Terri still pressed against the shower wall, ... wrapped one arm around her, my hand finding her tits, and with my finger I began pinching a nipple. My other hand slid up her back, between her shoulders and up her neck. I now had a full handful of my step mother's hair and as I pulled her head back I spoke into her ear, "get on your knees."Terri was caught off guard and tried to look back at. I take of my jacket, and sneak a look through the thin sliver of light between the doors, he is there, my heart beats harder, so I pull of my jumper, look again, then take off my brassiere and stand in the cubical bare-breasted.'It's now or never', goes through my head, as my hand touches one of the swing doors and push it ever so slightly, it opens and I let him see my breasts.Hi head turns left then right, then back to me. His huge smile shows it is clear, so my hand drops to my waist and I. We planned to grab dinner and a few cocktails and then meet him at the parking garage afterwards.When the night came, I wore a red satin blouse, a black leather mini skirt and black patent 5" heels. We went out for a nice meal and then had cocktails at another bar and I tried to give my husband a handjob under the table because we were both primed but he said he wanted to wait until later.At 12:45 we headed back to the car with me in the passenger seat and my husband in the back seat. At 3. I reached down and touched her wet lips, took my penis and entered the head inside her pussy lips, reached under her to cup her beautiful breasts; her nipples hard as diamonds in my palms. Ever so slowly, I entered her and felt my cock entered my sisters tight, little cunt. In all the way, then I withdrew slowly and rammed in fast and hard and she screamed "yes" and I smiled. In and out using her and taking her, she was crying with joy and mumbling "yes Master take your whore, this is so.