The idea was a crazy one.Fuck my sister in the car.Making it happen, though, that was a bit more difficult.One idea was to blackmail her with the vide...o that was still on my phone.Another was to just be aggressive and pull out my cock.The last was to be sly. I decided to start with sly... the other two still potential options.I would flinch my cock, every minute or so, directly on her ass and pussy.The first time I flinched my cock, Tanya was clearly startled... but acted as casual as she. It felt so good that I was ready to cum almost immediately but I wanted to prolong the feeling so I adjusted to long slow strokes of my eight inch shaft. Just then I felt another presence and turned to see Sue who lives behind me clad in a bright pink bikini staring at me from the end of the hedgerow. There’s a small hill behind my yard and a row of pine trees and her house is way back from there so I didn’t think they could see me. She must have been walking around and saw some movement and. I’d always make it look like I’d done chores, but I think she knew I had just bodged it.I walked upstairs, my mind trying to decide if I should get changed now or just get online and try to find the sissy video I’d only ever found once before. I opened the bedroom door, and there on the bedside table was one of our small buttplugs. We had a few sex toys, normally me pestering Katie to try new things. Hinting to try fetish related sex, and she generally paid lip service or we’d have 5 minutes of. I got back to my senses when I heard mom moving. I opened my eyes. Mom was getting off the bed. She smiled at me; her eyes still filled with lust. I smiled back at her, and rounding my lips and without uttering any sound I told her that she was a great fuck. She read my lips and smiled again and then went to the bathroom.Lying down there I took stock of the events happened in last two days. I came here very reluctant and only for one day, very eager to finish my Christmas celebrations with mom.