I [M] fucked my co-worker at a work party [F]

Some background. I work for a golf course, which in turns owns a few other courses around the city and the area. Each year, around August, we have a company party where pretty much anyone who wants who has worked there can come, get wasted, make some bad decisions, and start the school year or new jobs later in the week.

This story happened last year. At the time, was a 23-year-old manager at one of the area golf courses. I did the finances, the paperwork, the beer stocking, that whole drill. And I've always attracted a younger crowd of women. I have no idea why. I'm 6'2, 160 pounds. Blonde hair, blue eyes, played soccer in high school and college, and have maintained that sort of figure.

To the story. By boss, the owner of all these courses and businesses, has a HUGE house. One of the wealthier types in town. There are more than 100 or so employees, from ages 17 (the noobs) to a few 35 year olds. I, hanging out with the people my age that I worked with in the summers, am approached by Hannah.