It wasn't my idea of fun. My wife Sierra had agreed with her boss that we would host their work's Christmas party at our place. I resented the work getting the back yard and pool presentable, and spending a day of my weekend decorating, shopping for supplies and generally getting things ready. Anyway, I put on a not-too-resentful face for the sake of Sierra - it was important to her and she wanted to put on a good party for her boss and colleagues. 'Happy wife, happy life' they say, so I did my best to be enthusiastic and supportive. I also took comfort in having her work credit card to go shopping with, buying the best of everything we would need. Speights? Nope. Craft beers. Lindauer? Nope. The Mumm and Moët looks good. You get the drift. It wasn’t hard to look enthusiastic filling the shopping trolley with goodies on someone else’s dime. Most of Sierra's colleagues were nice enough, if a bit on the dull side. Architects, resource management consultants, quantity surveyors. But I was looking forward to spending time with a few of them. In particular, Sierra's boss from the Christchurch office, Megan was a good laugh, and totally gorgeous in a classy, curvy, confident way and her husband Jake was a down-to-earth guy, older, well travelled and always had a great yarn to spin. We'd had some fun nights out with them wining and dining. Even though Megan was Sierra's boss, they’d worked together for almost 10 years and working in different cities meant they treated each other more as equals. We’d become quite friendly. I was also hoping one of the interns I’d met at an awards function the previous month would be there. Her internship was almost completed and she was heading back to university for a post-grad in the New Year so I wasn’t sure if she'd be there or not. Shelly was in her early-twenties, short blonde hair, a little thin for my liking, and tall, even without her precariously high heels. She was heavily tattooed - gorgeous vintage images- and pierced which was a huge contrast to the rest of the conservative team. She dressed impeccably and professionally which I found a fascinating combination. What I liked most of all was her intelligent, quick, and cutting wit. The function we were at was dull and we had kept each other company at the bar cracking each other up, mostly at the expense of her colleagues - making jokes quietly between us about someone’s dumb speech and so-and-so being such an obvious suck up. Sierra teased me on the drive home that Shelly was flirting with me, but I’m pretty sure that wasn’t the case. What would a smart sexy young woman want with a guy twice her age? Besides, I was batting way above my league with Sierra. 5’6” long dark hair and dark eyes she turns heads with a fit but still curvy figure. I’m a legs and ass man, and while I adore Sierra's generous tits, it’s her legs and shapely ass that I know guys perv at. I certainly do, every chance I get! In bed that night after the awards function Sierra was on top - her favourite position - and she brought it up again. She changed from her usual slow sexy grind sitting upright and leaned down to kiss me deeply before moving her mouth to my ear. “She wanted you, you know. A woman knows.” Sierra whispered. I started to reply but the way Sierra thrust down hard on my cock with urgency I got the message she didn’t want to hear from me on the topic. “As much as men can be led by their cocks, sometimes they can be blind to a horny bitch right in front of their eyes” she said. Her breath was hot and wet in my ear and she moved down and bit my neck. She raised up and thrust herself down again. Then she lifted her hips up till the head of my cock was only just inside her and she continued whispering in my ear while moving herself so the tip of my cock was moving just a small way inside her and then back to the edge of her pussy. The pressure of her tight lips massaging my tip was building pleasure in me. I felt her hand move down to between her legs and start to flick her clit. “You could have fucked her. She wanted you, the horny slut. Her tits are small but I bet her nipples are pierced and sensitive and you could have made her come just by playing with her nips, like you do to me.” With that I squeezed both her nipples, hard enough to bring a sharp gasp. “She wanted you to give you the same pleasure. Give her pussy to you. Make you come in her.” She was rubbing herself feverishly now. I moved one arm around to her ass and started to run my fingertip around Sierra's asshole. “Be a dirty bitch for you” she said as I pushed the tip of my finger into her ass. The reaction was immediate and intense. She pushed back taking my finger in deeper before slamming down on me and coming hard with a squirt I don’t often get to enjoy from her. I held her close to me while she shuddered with pleasure, enjoying the spasms caressing my cock. The waves subsided and her breathing returned to normal. I thought that would be it, aside from Sierra making sure I enjoyed an orgasm too. How wrong I was. Sierra whispered in my ear, husky. “That bitch would have sucked your cock so good, and she would have tasted my pussy on you”. With that she swung herself around and took my cock deep in her mouth while giving me her very wet pussy to feast on. My hands went to her nipples and my tongue to her opening and then her clit. Very soon she came again, grinding her pussy on my face and I erupted in her mouth. She sucked, licked and cleaned every drop of come off me - not a first, but an uncommon treat - before turning back to me with a grin and an incredible, naughty giggle. So much of what happened that night was new or at least very uncommon in our lovemaking. I fucking loved it and I was hoping Shelly would be at the party so it might bring on something similar in Sierra again. Wrong again, but in the best possible way!