First, get your relationship with your husband really high,
Next, you follow this pattern: kiss kiss hug hug kiss kiss hug hug
Follow that pattern until you get a message saying "Should we have a baby?" It gives you a choice: yes or no. If you say yes, a baby will come up next to you in a crib, then you can move it anywhere you want, except outside. Your baby will turn into a kid eventually, but he/she might look weird when he/she is a real kid, so buy a closet and a vanity table if you don't like it's look. Hope this helped!