Although the option to make your Sim a statistic is not included with the game, you can use a mod to achieve your goal of impregnating your teenaged Sim. They see themselves as storytellers, using The Sims to entertain others. A mod is needed for a teen to have a baby. ForeignSimmer, a YouTuber with an ongoing series about a pregnant teen sim, told me she got her start creating narratives for her sims two years ago. After the download completes, move the file into the 'Sims 3' folder on your computer. If a sim is related to another sim, they can't romance each other-and they definitely can't marry each other, for example. Despite that ambiguity, Sims fans still clamor for teen mods that open up romantic possibilities. Pregnant Sims who were on the verge of becoming an elder do not age during the pregnancy. Mod the Sims If you are set on your teenaged Sim having a baby, you can use a cheat to impregnate the girl.