If you are there early June don't miss Summerfest Take in a spa get a complete massage for the two of you . Everyone loves a nice poolside with a fancy cold drink . There are some fabulous steak houses in WI
and  Milwaukee is known for its famous breweries and you can take a riverwalk boat tour and see them.
Milwaukee art museum has some great art. Pabst theatre also has live music ( you have to be a serious music lover to go) and I believe you might find a comedy show there too. Good luck in Milwaukee !

Related Link: Wisconsin