I think she was nervous. She kept looking around. Making sure we were alone. I walked up behind her and wrapped my arms around her chest, pressing my ...rect penis to her backside. She raised her arms as she pushed herself back with a moan, and I cupped her breasts and began playing with her little pink nipples. I lightly kissed her neck and moved one hand down between her legs, cupping her vagina before allowing my middle finger to explore her slit. She was soaking wet, and when I began gliding. As I kneeled behind her I let my right hand come down hard crashing onto her sexy ass make a loud clap noise and cause her to moan more. I did this three times then pulled her hair so the she kneeled upright against my chest. I place my left hand on her throat and my right hand between legs and rubbed up and down on her clit."OH GOD" she screamed before she started moaning and I then started choking her as she orgasmed again. I then pushed her down and placed my hands onto her waist and pulled. Behind the kitchen is the dining room and then there are two bedrooms with a Jack and Jill bathroom between them.’ ‘The Jack and Jill bathroom sounds pretty modern.’ ‘I did that for them for their fortieth anniversary. Upstairs is another bedroom and bathroom and Mom’s sewing and craft room. Still want to see inside?’ ‘Don if you’d rather not I certainly understand.’ ‘No as long as I don’t go to the bedroom and we don’t stay long I’ll be okay.’ I smiled and added, ‘Of course it would help. That weekend had been the highlight of 3 years of the most unbelievable and sexiest fucking and loveplay that any girl and boy ever experienced. And no one was any the wiser to the relationship between Samantha and Pete. They'd kept their secret well. No one but Pete and Samantha had ever known that in addition to being a brother and sister pair, they also fucked each other on a regular weekly and often many times a week basis.Nearly 25 years had passed since the last time Pete and Samantha had.