Yes, the only thing you have to do is fall in love with your soul mate and a question will pop up and when it does, click yes. Then a cradle will form in the room where you and your partner is located.But you need to make sure you look after the baby! OK SO I GOT THE LAST ANSWER THAT WAS WRONG ON HERE BUT YOU CAN DO WHAT I DID IN SIMS 2 AND 3!!
Actully in the sims 1 u cant get married but im pretty sure u can get married in the sims 2 unleashed