Of course

The conversation continued, very quickly become much less innocent. My brother started asking questions about which positions were safer for having sex with a pregnant woman, and Kate replied by naming a couple of positions, but he told her he really didn't know much about them because he and Amy generally only did missionary but changed who was on top.

The next email included pictures. I was taken aback. I couldn't believe what i was seeing. They weren't pictures she had taken off the internet, but pictures my largely sexless wife had taken of herself. And they were very sexy.

Kate was dressed, but not as she would normally be dressed when talking with someone other than me. She was sitting on our bed and had on a green silk night gown that was cut low enough in the front to show off some cleavage, not that it mattered because you could almost see through it. Her nipples were rock hard and poked through the fabric. Her pregnant belly was just starting to show.

"Missionary with you on top is always a safe position..." she wrote.

In the next photo she was laying on her back with her open legs facing the camera. Her gown was pulled up to show the white cotton panties she was wearing.

"You can also do doggystyle."

In the next photo my wife was on her knees with her ass facing the camera. Her gown was pulled up over her hips and her panty covered ass was on full display. There was a clear wet spot forming in the crotch.

She went on through a list of other sexual positions, modeling each as provocatively as possible.

My brother quickly responded:

"Damn, I just wanted some tips, but thanks for the show," he wrote. "I can't wait to try them out with Amy tonight! BTW, my brother is a very lucky man."

She replied, "Have fun and try not to think of me too much when you're fucking her. You know I'll be right here on the otherside of the wall listening. Let me know how it works out."

I couldn't believe any of what I was seeing and reading. It so didn't seem like either one of them.

The next day my brother wrote, "Thanks for the motivation last night! We'd just got started when you and Alan started. Hearing you moaning, it was hard not to think about your pics while I was with my wife."

She said, "Dirty boy! So which pic was your fav?"

"Doggystyle. I had no idea how nice of an ass you had."

Kate: "Did you think about my ass while you gave it to Amy from behind?"

"Yes."

Kate: "Okay, this is unfair. I didn't have a visual image to picture while Alan fucked me. I showed you mine, now its your turn."

Reading their back and forth email exchange was wierd. I knew I shouod be upset, but I wasn't. It was like reading a pornographic story. I found myself wishing they would take things further. I not only wanted them to fuck, I wanted to watch them fuck.

In the next email, he sent back a picture of himself setting on the edge of the bed in just his boxers.

Kate: "Tease much?"

"You were wearing a gown and panties, so this is fair."

Kate: "Is this better? Your turn big boy."

In the attached photo my wife had removed her gown and was laid back on the bed in just a pair of white panties. Somehow she made it look like a soft core glamer shot. Her boobs were perky and the curve of her belly was only slightly visible. She was so wet she was starting to soak through her panties.

I pulled out my cock and started to stroke it.