Meeting in the hotel
You think it's shabby and cheap? Maybe, but who cares? Find a good hotel and jump into bed. You will feel a lot more freedom than at home and really enjoy it.
Buy music
Visit the store along with CDs and find an album that shares common memories. No matter you are listening to it on the first date or danced to such music as teenagers on the discos. Spend two hours just listening and remembering.
Prepare dinner
Forget about the usual family dinner with the kids, food smeared everywhere, and loud brotherly squabbles. Buy together the ingredients for the food you love both, prepare together and quietly dine. So you will enjoy the food much more.
Boating
If near a river, pond or lake, rent a boat or catamaran and head out to conquer the water. Although it is not Venice, and the gondolier is not available, but a crook will give you unprecedented romance. 
Ride on car
Maybe you have long forgotten what it means to just sit in the car, listen to your favorite CDs and talking or singing. Children are, of course, a great joy, but their disputes, requests to stop the car to go to the toilet, do not allow you to enjoy the ride. That's why you'll appreciate the car, which will belong only to itself.