Her vaginal opening was sopping wet with lubrication. She was gasping and involuntarily arching her back and raising her hips. Definitely pre-orgasmic... and now I had to decide how to send her over the edge."I'm going to insert myself, my penis that is, into your anus, ma'am. We'll take it slow and easy, and if you feel any discomfort, just holler."Of course she didn't feel any discomfort. I'm a past master at back-door therapy, and I know just the right buttons to push to make it enjoyable for. It felt as if she could pick which part of her pussy lips she wanted to rub on which part of my dick as she slid forward and back. She could make the top of her pussy just below the clit slide up and down on the top of my dick or she could make the bottom part just next to her anus slide up and down on the bottom side of my cock. Sure she had her pussy wrapped tightly around my cock either way the whole time, but the extra pressure that would stimulate parts of my dick and draw the attention of. It was clear as day. She was under Aunt Mary's control. I wondered if Aunt Mary was threatening Laura. If that wasn't the case, Laura wouldn't have been this obedient and compliant. God, what had Aunt Mary threatened Laura with? A week down in the basement? A month? A year? Or was she threatening her with the lewd tortures she administered these past few days."Aww...I promise to help her out." I pleaded my aunt deceitfully, "Please, aunt Mary, can we go shopping?" I added to test their. I had to grab the seat handles to avoid falling. The dress fell to the floor. Mike and Bob were wondering if I was shaved “down there”. And now greeted with a bald pussy they stopped wondering. I waited and looked to be sure there are no more bumps coming up then pulled my dress back up. Giving a little bow I returned to my seat to applause from Mike and Bob.When the bus arrived at SU I thanked the bus driver for the ride. “You are very welcome. But I should be thanking you for the show. Oh,.