Dear Tiny,
Tonight Dad and I are going on a date. We're going out to eat and then we're going to watch a French film in a park. We're making an effort to spend time together before you come... because we're not sure what our lives will be like for a while after you're here with us!
I hope you won't mind staying with other people but even if you do, it's good for you. You'll get used to having a babysitter every once in a while. It's important for me and Dad to hang out alone... after all, you want your parents to enjoy spending time with each other, right?
(Secret answer: yes. You do. It makes life so much easier.)
Love,
Mama