I ran into the living room to find Megan sitting on the couch with her head hung low, holding it in her hands.
"What's the matter?" I asked Megan.
Through small sobs Megan replied, "I thought I would be ok with this, but actually seeing you and Sara have sex was harder than I thought it was going to be. I thought it would be more of a mechanical act with no passion involved, but she was definitely enjoying herself in there. The way she clawed at you and wrapped her legs around you left little doubt that she was doing more than just laying there accepting some sperm."
"I'm sorry baby, I was so afraid this would happen," I replied, "but you were so persistent about us doing this to help her out."
"I know, I know," sobbed Megan. "I'll be fine, it was just a bit more of a shock than I was expecting."
Sara then walked into the room, surveyed the scene and asked if everything was ok. Megan explained to her that it had gotten a bit more intense than any of us had planned on and it was a little tough for her to sit and watch.
"Sorry about that," Sara said. "I honestly had no intentions of enjoying this, but it's been so long since I've had any sexual contact at all that I just got carried away and couldn't help myself. I should probably go now, I'll talk to you later Megan, ok?"
Megan nodded, and with that Sara walked out the door. I sat on the couch and put my arm around Megan and started explaining to her that it wasn't anything more than just sex, there was no love or anything else involved. She said that she understood that and would be fine with it, after all, it was her idea but it was just the initial shock of seeing it happen in front of her.
I got us each a glass of wine and we curled up together on the couch to watch a bit of TV. I was sitting at the end of the couch while Megan stretched out with her head in my lap. As we were watching TV, Megan's hand slowly started massaging my thigh. As she massaged upwards I reached around and gently started caressing the nipple of her left breast through her shirt. This continued on for a few minutes until Megan said, "I have to admit, while it was hard to watch, seeing you and Sara go at it in there made me incredibly horny as well."
"Well, that's one problem we can definitely solve," I replied as I pulled Megan's face up towards me and kissed her gently on the lips. She responded by kissing me back, slipping her tongue into my mouth as she kissed me with a bit more urgency.
As I started to kiss my way down her neck, Megan said, "No need for foreplay, what I need is a good hard fucking, right now!"
"No need to tell me twice," I replied as I slid my shorts and boxers down to the floor.
With that, I reached up and pulled Megan towards the floor with me, pulling her shorts and underwear down her legs at the same time. She then positioned herself on her knees and bent over the couch with her ass wiggling directly in front of me. I didn't need any further hints as to what she wanted, so I slid up behind her with my throbbing cock in my hand, guiding it towards her pussy until I felt the head of it push against her warm, wet slit. I paused for just a second to position my knees outside of her legs and then pushed forwarded, burying the entire length of my shaft to a hilt inside of her while thinking how funny it was that I was ball deep inside my wife's pussy when I had just been inside her best friend's pussy less than 30 minutes ago. She left out a loud moan and then pushed back against me while gyrating her hips. I pulled slowly back out of her, savoring the feeling as each inch of my shaft slid along the walls of her smooth box until all that was left in her was the head of my cock. I then slammed it violently back into her, practically knocking her into the backside of the couch as I drove my cock as deep into her as possible. She moaned even louder and I then reached under her t-shirt and cupped her breasts with both hands while I began to thrust in and out of her at a nice steady pace. Megan moaned as she pushed backwards into me to meet each of my thrusts, I could feel my pelvic bone slamming into her ass with each thrust. As the pace quickened, I reached down with my right hand and found her swollen clit and started to run up and down it with my index finger while we fucked, still massaging her bra-clad left tit with my other hand. As her pace and moans increased, I could tell Megan was nearing climax quickly, so slid my face up the side of her neck and whispered in her ear, "I love you baby," and then proceeded to nibble her earlobe before alternating between sliding my tongue in and out of her ear and blowing warm air into it a few times.
This proved to be too much for her, and she started to yell out loudly while she slammed her hips backwards into me, milking my cock for all she was worth as her body shook from the intense orgasm that had taken over her body. She continued orgasming for at least a solid 30 seconds, moaning and bucking back against me the entire time until she collapsed onto the floor on her side in front of me. I lay down on the floor behind her on my side, and re-inserted my dick into her slowly while I spooned her and started pumping once again in and out of her while holding firmly onto her hips. I continued this for a few minutes, savoring the feeling of her overly-lubricated pussy while squeezing her ass cheek firmly as I used it for a handle to allow me to thrust even harder into her. As I neared my third orgasm of the evening, Megan started to respond again by pushing against me slightly while lowering her hand down to rub her clit as I continued pistioning in and out of her. As my orgasm started building deep inside of me, I moved my hand up from her hips under her shirt again to her right breast and began rolling her nipple around in between my fingers roughly. This was enough for both of us, and I grunted loudly as I started to unleash my third load of the night deep into Megan's orgasming pussy. We both lie there grinding and caressing each other for a good full minute as we milked every last drop of our love juices from each other. After we both finally caught our breath, I turned Megan over to face me and we talked for a few minutes about everything that had happened that night with Sara, and both agreed that it would never happen again. If the seed didn't "take" so to speak, she was just going to have to find somebody else, as we both agreed it wasn't a good idea for us to pursue this any further.