Patrick Duffy and Linda Purl are making real-life headlines with a love story sweeter than any script. But did a secret “I do” happen under the California sun? It’s a question many are asking after a recent Instagram post. Linda Purl and Patrick Duffy’s relationship are deeply in love and aren’t shy about showing it off. A recent Instagram post by Purl caused a stir among fans, leading many to speculate if the couple had secretly tied the knot. The adorable selfie captures them wearing glasses and face masks. It shows Duffy in a maroon and white checked shirt with Purl leaning affectionately a…