Number one, this is why it's best to NOT get involved with anyone you work with. Number 2, she is married and is likely experimenting. I personally would not want to become entangled in someone else' marital problems. It usually doesn't end well and someone inevitably gets hurt. I know of one couple, friends of mine, who have an open relationship. All involved are happy, comfortable, safe and healthy and they talk openly about it with their respective girlfriends and boyfriends. I feel they are the exception. Feelings inevitably will develop, annd then what? Then you're in a love triangle. I would avoid this altogther. As for the awkwardness, just be friendly and professional. I would revert back to more of a professional and friend-level relationship with this woman and keep your distance romantically. That's my two cents.