Each year my wife and I pick a theme for our birthday gifts.

One year sex was the chosen theme, and Zoe wanted a threesome as her present. This led to us calling our friend Mark, who’s an architect, and inviting him to spend that Saturday night with us at a newly restored hotel. Mark agreed.

On Saturday, we drove to the hotel and at 5 p.m. Mark arrived. Zoe took a quick shower and dressed in her garter belt and bra in front of us. At Mark’s request, she left her panties off.

During dinner, Mark teased Zoe by fingering her moist pussy. After our second bottle of wine, we went back to our room for her birthday threesome.

Mark and Zoe began kissing and undressing, and before I knew it, he had her lap-dancing on his hard cock. I took some great photos as they fucked.

Zoe loves frontal action and kissing, so she took another drink and turned around to straddle Mark. His cock was deep inside her as he kissed her breasts, and she was really enjoying herself. I took a couple more photos and then got undressed myself. This scene continued until we decided Zoe should move to the bed so we could both enjoy the fun and double her pleasure.

First we got her off with some two-guy action, with Mark giving her some lengthy oral attention, me kissing her breasts, and her sucking my cock. She came at least three times.

Once Zoe had recovered, she began alternately sucking our cocks again. When Mark was ready, he pulled her up on her hands and knees and fucked her from behind while she continued to suck on my prick. With him fucking her juicy cunt and diddling her clit, and me tweaking her sensitive nipples, Zoe experienced multiple orgasms. When she begged Mark to fuck her in the ass, I almost lost it.

Zoe reached into her bag on the floor and handed Mark a tube of lube. He worked first one, then two fingers, into her tight asshole until he felt she was ready. When I heard a low, guttural moan escape her lips, I knew that Mark was pushing his hard-on into her backdoor. With each thrust, he groaned and she moaned. Then his thrusts deepened and quickened, and when he exploded inside her, it was as if his orgasm went directly through her. He gripped her hips as she quaked with her own climax. Seconds later, Zoe collapsed on top of me and Mark collapsed on top of her.

Mark went to the bathroom to wash up. I stroked Zoe and myself while I let her rest. Although this night was for Zoe, I was still hoping to come myself. When she’d caught her breath, she started my blowjob again, but I stopped her when I felt I was getting close. I pulled her on top of my cock and let her ride me at her own pace until we came simultaneously, drenched in each other’s sweat.

Mark returned and got some good shots of Zoe and me with the digital camera. Then he gave me the camera and knelt on the bed so Zoe could give him head. When he blew his load, she swallowed as much as she could, and I was right there the whole time with the camera getting some close-up shots of her deep-throating him.

Somehow, we misplaced those memorable photos during our last move, but I still get a hard-on when I remember what it was like seeing Zoe get fucked by our friend.