“Here will be an old abusing of God’s patience and the King’s English,” says Mistress Quigley, played with cheeky humor by Martine Fleurisma in Elm Shakespeare Company’s production of one of the bard’s lesser-known works, The Merry Wives of Windsor. The production plays fast and loose with the audience’s expectations, but it never betrays their patience or wastes their time. Instead, The Merry Wives of Windsor — running now through Sept. 3 at Edgerton Park — provides exactly what it promises: wit, wiles, wanton scoundrels, and scheming wives. Most of all, it supplies the audience with over two hours of good, old-fashioned fun.