Really not a big deal. I was the #2 man at the company, the #1 guy and I interviewed her together and immediately hired her.
That night we were discussing her, and #1 says "she's hot...you should try to fuck her". We laughed. Yada yada yada, we all went to a conference, drinks were had, and I fucked her, and it evolved into a full-blown relationship, and it was really great, until it wasn't. The working together part never really became an issue, except she resented that she wasn't as involved with the business as I, naturally, was. At night, she'd want to talk about business shit and I wanted to forget about it.
EDIT: we lived together for a couple of years, went out separate ways, and we're still friendly (but not close) 13 or so years later. We would probably still see each other occasionally for a drink or coffee or something, but current GF isn't cool with that. She's fine with me seeing my female friends, except for the ones that I fucked.