On a trip to DC I was with several coworkers. We had stayed in a loft we found on airbnb. It had 4 rooms on 2 levels. Our manager was in a room on the top floor and our 2 female coworkers were in the 2 other rooms on that floor. I was in a makeshift room on the bottom floor next to the living room that was just some thin wood walls and a barn door with no lock.
Anna was a coworker who had been very flirty and had been making her desires known over time. Very innocent for a while, small statements here and there. This trip opened the door for us to explore each other.