a married co-worker searching for sexual...?

[Sunshyne]

I honestly think you should just ignore it. She's not a friend I assume and neither is her hubby? She's a co-worker and that's it? If that's the case, then mind your own business. Getting involved would only make things horrible at work. If you feel like you can't let it go, then tell her you saw her FB and that you think what she is doing is wrong and how would she feel if her hubby was doing the same thing.... but you can't tell her to quit her immoral acts because it's really none of your business how she chooses to live her life. You may not agree with it, but it doesn't affect you. You live your life the way you need to and let her mess hers up if that's what she wants to do.