I finally opened the door, wondering why all the lights were out. Natalie should've been home.
"Nat? You there?" I called out. No reply came. I made first towards the bedroom, and was surprised by what I saw there.
As I pushed open the door, I saw my wife, Natalie, and Amanda, the women who we had had a threesome with just a week ago. Both women were naked, on the bed, in each others arms, their breasts, pussies and lips mashed together. The sight made me gasp in surprise, not to mention just about cum in my pants on the spot. The two women stopped when they noticed I was in the room, and both sat up immediately.
"Mark…?!?!?" Nat asked in surprise.
"Yeah… I got off work early." I said slowly. "Now, what's going on here?" I asked.
Natalie looked like she was fighting to find an answer, but Amanda was seizing control now. She stood up and gave a devilish grin.
"Why, we were just getting ready for you, Mark." The beautiful red-head said, making her way towards me and grabbing me by the crotch. She began to squeeze my half-hard cock, and I gasped again. "You really should knock before you enter, Mark. Now we're going to have to punish you." She purred, letting her other hand cup my butt. She pushed herself in close to me, rubbing her naked body on my clothes, her hand still slowly squeezing my dick. I could do nothing as she kissed me full on the lips, before her hands began to unbutton my shirt. Now I could see Natalie coming over, and as Amanda tossed away my shirt, Natalie unzipped my jeans and pulled them down. My boxers soon followed, and in just a few moments, I was naked too.
"Now, Mark, get on the bed. On your back." Amanda commanded, and Mark quickly complied. Natalie pulled some rope from the bedside drawer and began to secure my hands to the bed posts as Amanda continued.
"Nat and I are now your mistresses, and you will call us nothing else but that. You are our slave, and as such, we demand that you not speak unless we say so. You will do everything we say, or you will be punished further. Do you understand?" Amanda asked as Natalie finished on my wrists and began to work on my feet, securing them half-way up the bed posts at the foot so that my legs were in the air, spread out, my cock and ass both open to them. I nodded in response to Amanda's question.
"Good slave. Now, what shall we do to him, Nat?" Amanda asked, as Natalie made her way to Amanda's side.
My two mistresses, completely naked, side by side. It was nearly enough to make me die of excitement.