Roller Rink! LOL!
Walk in the park by twilight...?
Movie, Dinner?
Go to the library together?
My hubby and I are going to Galena, IL ( a town that lives off its past, lots of historical homes and buildings, and touristy neat little boutiques) for a weekend together a week, from today, we will shop, eat, and go to all the little historical sites and take the tours.....is there anything like that around your area?
Just go sleep overnight in a hotel with a pool, with no kids, sleep in, have some fun without worrying about being interrupted, go actually SWIM in the pool without having to worry about anyone drowning!