I'm so pleased that you're asking about your own feelings, instead of trying to control your husband or his new teenage employee. I suspect the situatoin is stirring up some deep fears for you, fears about aging, about your personal value, your distant future. It could be that you also feel your husband being attracted to his employee, but to be blunt, there's not a lot you can do about that. If she went away, there would be other cute young women around your husband anyway. I suggest you write about your feelings in a journal. Start by writing, "I feel jealous and afraid because..." and then keep writing. Be as honest as you can. You'll probably find that the real issues are your own deepest fears. By addressing them, you'll relax and gain self-confidence. People, including husbands, love being around relaxed, self-confident people. Believe it or not, being your best self almost always trumps a thong when it comes to keeping someone's love.