I admit, I usually make my Sims' lives pretty boring. They're always kind of perfect. So I decided to spice things up and add a little drama. For no reason at all, I had the husband cheat on the wife ...
TS2 was fun because if there was a pregnancy and the father wasn't the sim's spouse or lover then they would get jealous and have a reaction. TS4 its like they don't remember that they didn't woo hoo so they can't possibly be the father. TS3 too, I could have a sim cheat and a baby be the result but no one seemed to notice.