She can't help herself she says yes

Betty shut her eyes moaning and breathing hard trying hard to not fall off of my lap. "I will do anything for you John, please I need to cum." She said.

"Of course I will let you cum honey but you have to answer my question don't you?" I removed my probing finger from her pussy and held it to her lips telling her to lick her juices from my finger. "You see, if you don't answer my question not only will I not let you cum but I won't allow you any time with my sister."

"Please John, I will have your baby and I will be your cum slut. Please let me cum."

I let Betty have her orgasm and she collapsed against me. I kissed the top of her head. "Tell me something Betty I am curious on the night you were supposed to meet Jane at the club were you expecting something to happen between the two of you and you chickened out at the last moment?"

"I got nervous, I mean Jane is so much more beautiful than I am I didn't know what I was feeling after all we talked about boys all the time and we did kind of playfully grabbed at one another but that was as far as we ever went." Betty said now that her breathing was once again under control.

"You are just as beautiful as my sister and if you must know, your breasts look to be about the same size as hers. Do you like what you see? I want to hear you tell my sister that you are sorry for having missed her at the club the other night. I want to know if you had thoughts about making love to Jane." Betty nodded her head. "My sister had the same idea and she did not wear a bra that night so I think she wanted to test the waters with you."

"I'm sorry Jane I should have shown up and I bet you looked sexy as hell without your bra on. Can you forgive me?"

"Of course I forgive you after all when you didn't show up John decided to take a hand in making my love life interesting."

"Now Betty," I said. "I want you to crawl over to my sister and I want you to eat her pussy until she comes and then Jane will have her turn with you."

For the next hour or so I watched the two friends making love to one another. "So Betty, are you happy now?" She smiled and told me that she was very happy. "You accept the idea that you and my sister will be my baby makers as well as my pets?"

"Yes of course I accept it John, I am happy to be at your feet." Betty said.

My sister said the same thing as her friend but she seemed to be a little unsure of herself. I sent Betty into the house to bring out some cold sodas. "You seemed hesitant sis." I said once Betty was out of ear shot. "Why did you sound so uncertain of your words?"

My sister moved to sit on my lap her breast pressed against my chest and her lips were warm when she kissed me. "John,: she said softly. "What we did, what you did to me was so wrong in so many ways and it can't be taken back." My sister squirmed a little on my lap as I stroked her inner thighs. "You humiliated me in public, you had unprotected sex with me in public, you had me dance half naked and you spanked me and chained me to your bed."

"Yes I did sis, I told you that I had dreams about having sex with you. You also sucked my cock in pubic and you could have stopped me by running off but you didn't, you obeyed me every step of the way remember?"

"I know John, I know. I couldn't help myself, I couldn't stop myself from obeying you and when you finally had sex with me I was scared and yet I felt myself compelled to do whatever you wanted and when you entered me I thought you were going to tear me apart but you didn't and I found myself wanting your cock inside of me, the wrongness no longer mattered to me John." She paused to kiss me. "I wanted you to stop, I told myself that it had to stop but you started calling me names like whore and wanton slut and it turned me on so I knew deep inside that you were for better or worse my Master." I asked her again why she was slow to respond about the pregnancy talk. Jane moved until she was astride my cock. "I'm worried about the health of any possible baby and I worry about mom and dad finding out." My sister continued to ride my cock as she spoke. "I want you to fill my pussy with your sperm honey, I am your slut now and I want your child John. I really want it to happen."

By the time I came inside of Jane's pussy Betty was on her way back with the cold drinks. She smiled at Jane and me and she asked me permission to lick my cum from Jane's pussy and of course I said yes.

"There is going to be another club meeting coming up next week." I told the girls while we relaxed and floated about the swimming pool. "I took Jane to the last one and I plan to bring her again only this time you will be with us Betty it will be on Friday evening and you can tell your parents or your boyfriend that you will be spending the night with Jane."

"A club? You are going to have sex with me in public?" Betty asked seemingly surprised. "Of course John if that is what you wish of me I will do it since I am your sex ****."

"Prepare to be humiliation for you but you will do it just the same." I said.