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

[MindUrbusiness]

with the absence of one of my female co-worker,i was forced to sit and work at her place,getting some free time i just tried to check my Facebook account,and when i try to do so...her profile appeared! this is because she is permanently logged in(forgetting that this is the comapny's machine).something attracted my attention because the profile pic was not her real picture...finally i came to know that the woman has created a fake account with a fake pic and claiming that she is single and never have a relationship.when i read the conversations she made with her friends its all about 'i need to have sex with you'.she is married before a year+.should i tell her husband what is going on? or should i tell her to stop her immoral acts??? or SHOULD I IGNORE AND MIND MY OWN BUSINESS? don't know what to do