"Let her loose and help her get cleaned up and out of here...I'm hungry, I'm gonna go for a burger." I said.
I left as Kelly began untying Mary. When I got home Kelly was washing the butt plug in the kitchen sink.
"So are you mad at me?" I asked.
Kelly turned and looked at me.
"Hell yes I'm mad at you John. I'm absolutely furious with you. How could you do that to my mom? That's our box of toys; that was our game you played with her. That was supposed to be special and just for us." Kelly said.
"For us it is just a game. What I did to your mom was real. I wasn't playing and neither was she. How'd she act when you let her loose?" I asked.
"She acted small. She didn't start yelling, she didn't seem angry, she didn't want to call the cops. Before she left she said to tell you that she was sorry. I don't think she's ever said she was sorry to anyone about anything." Kelly said.
"I guess then she might have learned her lesson." I said.
"Probably, but don't be surprised if she wants you to teach her again. She had that glow that you say I get...she's had a taste and she wants more." Kelly said.
"Great so I'm going from an evil bitch of a mother in law to a cock hungry mother in law." I said.
"It seems like and upgrade to me. Especially since I didn't stop her from being a bitch and I don't intend to stop you from fucking her." Kelly said.
"What would your dad say if he finds out?" I asked.
"We don't have to worry about that; mom will never admit to anyone that this happened." Kelly said.
A few weeks later we found out that Mary was indeed pregnant. Richard, her husband, was thrilled despite the fact that they were both 47 and were expecting a child as Kelly had been their only child.
So as it turned out I did end up fathering my own sister in law Lisa. There's a 25 year difference between Kelly and her baby sister Lisa, but there's only a 3 month difference between Lisa and her niece/half sister Emily.
Mary has been really nice to me since that first time...it's the only way she'll get more of my cock. As long as she's nice to me...I'll be 'nice' to her.