Editor's note: This is the first of a series of pieces on local residents in Fox Point and Bayside that do a bit more than just cut the grass. If you have a unique neighbor with a great story, nominate them for our Get to Know Your Neighbor feature by emailing the editor at: sarah.worthman@patch.com. How do you describe the 30-year love affair of Joe and Mary Biebel? You could say they're a middle-aged Bayside couple who run an insulation business and relish Mary's home-cooked meals. But that leaves out the international fencing tournaments. And the award-winning romance novels. They met in a…