Kitty Dukakis, wife of Massachusetts Gov. Michael Dukakis, is already traveling and talking about her drinking problem and even had a joke about it in an address at Villanova University Wednesday. The speaking engagement was Dukakis' first since being released from a rehabilitation program nine days ago and she showed up with a bandage around her left ankle, which she explained by saying she had been tripped up by a pothole on a Boston street Monday. "My first thought was, `Thank God I'm sober,' " she said.