I try to push her away

My hand was still gripping my softening cock, and I realized that the panting girl in front of me wanted me to keep going with her in the worst way. I decided to make her desire grow even more and take a step back. “Yeah, well it’s pretty normal for me and I think every other guy. Maybe we should step back a bit and think about this. I am not sure your sister would appreciate me doing this in front of you.”

“Well like I said before she doesn’t have to find out, or anything. Why can’t we fool around a bit while she is gone? I don’t see what it is going to hurt. It’s not like I am going to tell her or anything.” She teased one of her big pink nipples as she said this making the little nub swell back to full erection.

I tried to say strong as I answered her, “Yeah, that’s what you say now but I know how girls are. You will start to feel guilty and next thing you know I end up on the hard end of some questions from my wife that I don’t want to answer.”

“Really Paul, that won’t happen. I swear, I won’t tell. I want to see some more, maybe you could even watch me if you wanted to.”

"Bingo," I thought to myself that was what I was waiting to hear. She suggested it, not me.

“Alright I guess we can keep doing it for each other. I just want to be perfectly clear, no one but us knows this is going on you got it. You sister would probably divorce me if she found out.”

“Don’t worry Paul I won’t tell anyone, I swear.”