Have Sam lie on top of Emma.

"Honey, do mind lying on top of Emma on the edge of the bed?" I suggested.

Both girls grinned at the proposal of the Butterfly position and excitedly moved into place with Emma's ass raised up by two pillows. They giggled when my wife laid on top of her best friend, with her legs spread apart and their large tits squishing together in a mass of soft flesh. I soaked in the gorgeous view of the two wet pussies before I stepped forward, grabbed Emma's ankles and rested her high heels on my shoulders.

"Ooooh yeah," Emma cooed as she felt her tight cunt stretch wide apart by my thick cock. "Fuck my little pussy, Mike!"

"Fuck her, honey!" my wife shouted the encouragement only Emma's best friend could.

So I did. For a couple minutes I pounded Emma's cunt like a mad dog in heat only to abruptly pull out without warning and stab Sam's pussy with my raging erection. I realized it was the first time that week that I had fucked my wife since I was so engrossed in knocking her friend up. I fucked her for a couple minutes before sinking my cock back into the warmth of her friend's pussy. As I took turns pounding their cunts, the two girls were passionately kissing each other like long lost lovers, moaning each other's mouths as their bodies took the brunt of my thrusts.

After a while I decided to concentrate on making Sam cum first. Luckily it didn't take long with my strokes and Emma's kiss and tender caresses, she was overloaded with erotic senses. I continued to pump in and out of her when she started to climax, only to finally stop when she broke her kiss to let out a cry of ecstasy. When her body stopped shivering, I gave her a playful slap on the butt and she obediently rolled off of her friend. But my wife would not sit idly while I concentrated on hammering away her friend's pussy -- she latched her lips around Emma's erect nipple, sucking on one tit like a hungry baby before switching to another.

"OOOOH GOD!" Emma screamed as she came harder than any of the times we had fucked in the motel room.

I couldn't hold back much longer after fucking two hot, tight cunts, I let out a loud groan and spurted thick ropes of semen into Emma's womb for a good minute.

"We still have about forty minutes left," Emma giggled as she squeezed my still hard cock with her pussy muscles.