Generally the advice given her on not to shit where you work, is pretty sound. The risk of a sexual harassment complaint (if you are in a position of authority over her, and sometimes even if you are not) is something to seriously consider. I generally avoid getting entanglements of a sexual nature at work except in cases where I am about to leave the company or she is. Part of this from a somewhat traumatic experience in my younger days.
When I worked for a small company, I became my CEO's blue-eyed boy after impressing her with my abilities. She was a hot MILF in her 30s, with a tight body despite having had 3 kids. Well she kept taking me along for business trips, and eventually she made a move on me. Being young, single and horny, I happily succumbed to her advances. It went on for over a year, but only during business trips (except for a couple times in the office, when we both worked late and everyone else had gone home) which were pretty often. I thought I had it made. I started a relationship with a GF (outside of work), so I had plenty of action on the weekends. During business trips, I did the boss. And at other times, I would monger around and had a few regulars.
It all came crashing down fast within a 2 week period. First, my GF's period was late (we did it bareback as she was on the pill) and she panicked thinking she was pregnant. I got scared too. After clearing it up when the doc said she wasn't pregnant, and it was probably due to work stress, I thought I was fine and dandy. Then, one day, my boss pulled me aside and took me out of the office. She told me, I had gotten her pregnant (she wanted it bareback, she was on the diaphragm).
. She was freaked out and worried that her husband would find out. She seemed on the point of a nervous breakdown. I was speechless and not sure what to do, as she's the boss, and I had just gone through one stressful week, only to have it repeat, only now its for real. Eventually she arranged for a secret abortion (she and her husband had already decided 3 was enough). After that, our FB relationship just tapered off and died.
So.... moral of the story, avoid work sex! Unless you are willing to take the risk. When single and young, you don't have that much to lose. But as you get older, married (or in long term relationship), and more senior in your career, you have a lot more to lose!