Your spouse probably has a lot going on in her life and so it's a good idea to take charge in planning some fun things for you to do as a family. Surprise your spouse with plans that you've made in advance, going out of picnic, going to the zoo, going to aquarium together, whatever it is that you like to do for fun.
It is important for you to have outings just the two of you, but is also important to spend time just as a family doing things that you enjoy most. She will have even that much more fun if she doesn’t have to worry about any of the preparations. Just make sure that you have everything you need to take care of the kids while you’re out and about so that this does not become a source of stress for either of you.