I was watching my wife Donna masturbate when she brought the idea up. She was lying on our bed, cupping her right breast with her left hand and rubbing her thumb over the nipple, while her right hand was pushing a dildo idly in and out of her vagina. She was breathing heavily and I was too. She had just orgasmed, and I was getting there, as I sat in the chair in our bedroom, watching her come down and fisting my cock through a light coating of lube.
Donna looked over at me in the chair and said "I'd like to put this in you." My eyes jerked up to meet hers. "What?" "You heard me. I'd like to see how you looked getting fucked with this dildo." I kept jerking. "You naughty little skank. You want to fuck me with your own dildo?" She smiled. "Yup. I'd like to blow you at the same time. Would you like my mouth on your cock and my dildo in your ass?" I began to gasp. I was at the cliff's edge. "Ohhh, yeah..." "Cum, then, Steve. Show me how much that would turn you on, you big man..."And being obedient, I did, ropes of cum boiling out of me and decorating my stomach.

Donna had played with my ass a little – rubbing it with her fingers, sometimes putting one finger up there – and I liked it. "What about tonight? Wanna date, lover boy?" Her eyes hooded and she looked at me over the coffee cup with her "smolder" in full force. A "date" usually meant a nice dinner, a bottle of wine, and maybe a porno to watch, followed by some hot and heavy. I smiled back. "Alllllll right, then." And that was it.We lay on the bed, kissing each other, exploring each others' bodies and finding the places we knew so well would make each other feel the best. "Surprise, baby." She'd bought a strap-on. I hadn't quite been thinking of this. She stepped into the thing, and buckled the belt around her waste. She stood in front of me, her nipples hard, her eyes glinting, and an erect cock at her crotch. "Are you ready?" I nodded. "Then come here, baby. Suck my dick." She walked to me, and pushed gently on my shoulders. I went to my knees, and there it was.
I was sucking my wife's 'dick', and she was enjoying the role playing. "All the way down, baby. Show me you can take it all." I felt her push it all the way into my mouth, and felt my throat constrict. I hadn't realized this was what it felt like. She thrust back and forth, and then grabbed my head. "Yeah, baby. Take it." I could feel my dick bouncing at ground level as I gave my wife her first head. "Come on, baby. I wanna fuck your ass."I watched her reach for more lube. She put some on a finger, and slid it into my ass. I felt it work past the sphincter, and suddenly felt relaxation. "You're tight, baby..." She touched my balls again, and my cock twitched in response. She brought the re-lubed dildo to my ass, and gently pushed at the opening with it. "Ready, baby? Here I come." She pushed in, and I felt filled to the brim. "Oh, my God." "Did I hurt you, baby?"

"No, but just stay there." I felt full, as full as I could ever. She shifted slightly, and I pushed back. "Oh, baby. Fuck me." She began to thrust, slowly. "Ohhh, that's it, baby. Slow. Let me get used to it." I was a bit worried when I had first seen the strap-on. I was concerned that I would be somehow effeminate, or gay, getting screwed. But I didn't feel that way. It was ... just different. Still my wife, still her sexy self. I looked back and she bent over. We stretched to kiss. It was just that she was dominating me, in a fundamental way.
I was leaking precum almost continuously now, and Donna was picking up a rhythm, of stroking in and out of my ass and of talking dirty, even for her. "Mmm, baby. I think I like fucking you almost as much as you like fucking me, baby. Do you feel me in you?" I lifted my ass up, letting her in deeper and allowing me to reach underneath and stroke my cock. I started to rotate my hips in rhythm with Donna, and I touched my nipple. Christ, I hadn't imagined tonight like this, but I liked it.