To get a baby after you're married on Sims Freeplay, buy a crib as a couple then click on it. You will then be prompted to create the baby. You have to be carefully about how you handle the new baby, because if you abandon him or her, social services will adapt responsibility. Learn more at http://sims.wikia.com/wiki/Relationships_(The_Sims_Freeplay).
Sims 1, 2, 3, sims medieval, expansion packs? I know anything about the sims, cheat cheats would be, for sims 2,3,medieval motherlode for money, 1 rosebud for money, 3 testingcheatsenabled true, then hold shift and click on the mail box and get stuff