We don&#x27;t know if the mentioned person&#x27;s mother tongue is English. They may well not know that MILF is mother I like to f*ck.  I&#x27;m from a non English speaking country and I can say that I haven&#x27;t met anybody who&#x27;d know that.  I myself didn&#x27;t know that until I read a Wikipedia article.  The OP should first try to see if this is the case, otherwise fire them.  Some are bad at flirting, and sometimes you say silly things.  We shouldn&#x27;t be this generous at calling everything sexual harassment.