Try:
Peter & Barbara Snape, Paul & Liz Davenport, Tom and Barbara Brown, Dave Webber and Anni Fentiman, Issy and Dave Emeny, Barry and Ingrid Temple, Peta Webb & Ken Hall; I could go on. These are a few of the current male-female duets in the English folk scene. I can't understand why the postings on this thread haven't mentioned them.
Most have websites or should be available if you google or Youtube them.