As Christmas dinner has ended all the family retires to the den. Everyone comfortable in front of the fire, laughter breaks out as everyone watches Christmas Vacation.
You stand up and walk to the kitchen to refill your wine. As you enter the kitchen you see your wife’s sister cleaning up dishes. You pour some red wine in your glass and then sit on a bench facing her. Her back is turned to you as she starts to make a vodka tonic. Your eyes drift to her heels and then you slowly admire up her legs, her silky pantyhose covered thighs. Her skirt accents her perfectly shaped ass and you want to touch it so bad.
As she finishes making her drink, she turns and walks toward you. She takes one hand and flicks her brunette hair over her shoulder smiling at you with her flirty grin. She sits down beside you and sips her drink, slowly crossing her legs. Your eyes again are drawn to her beautiful legs. The way the light reflects off her silky black pantyhose drives you crazy. As she notices you looking she giggles and touches your hand. You nervously sip your red wine as she moves closer to you. She leans over and whispers in your ear how much she wants you, the aroma of her perfume is intoxicating.
She slowly uncrosses her legs and stands up. She walks across the room to the stairs. Your eyes again are drawn to her ass and down her legs. She walks up two stairs and turns around giving you a seductive wink. You know she wants you and you can’t resist her erotic temptation.
You put your wine glass down and follow her up the stairs. As you enter her room she turns and pushes herself against you. You push her hair back with your hand and slowly kiss her neck. Her aroma fills your lungs as your hands feel down her sides to her ass. Her hands start to unbuckle your pants. Your cock growing hard as you pull up her skirt revealing that she is wearing black thigh high stockings. You pick up her petite body and toss her onto the bed. You step out of your pants and crawl onto her. Your lips slowly kiss her feet and up her legs as your hands feel the silky stockings and the lace top. You kiss your way up to her thighs and then pull off her black thong. Your lips kiss all around her pussy lips but you don’t kiss her pussy yet. Your teasing her a little. As she starts to wiggle and beg, you start kissing her pussy and your tongue massages her clit. After a minute or so her legs contract around your head and her body begins to shack as she cums hard.
You then crawl up and take the head of your cock and enter her wet pussy. She moans as your long shaft penetrates her. Her silky stocking covered legs wrap around your back. The laughter of the family watching the movie can be heard from downstairs as the your cock continues to pound her pussy. You suck on her perfect nipples as your cock fills her warm wet pussy. She starts to moan louder and louder as you feel her pussy contract around your cock as she cums again. Her legs squeeze your back and you feel her silky stockings against your back. You explode inside her with an incredible orgasm.
You slowly kiss each other as she whispers how great you were. Then you both get dressed and rush downstairs to rejoin the party as if nothing had happened. The rest of the night the two of you lock eyes across the room, both of you wanting more.
As you know, I am the biggest office slut. There’s nothing I wouldn’t do to get a raise and there’s so many other wonderful perks to fucking my way to the top. 
