Cheating
This may work, depending on the sims attitude.
1. Have two sims woohoo in heart bed often. Guy MUST have high outgoing level
2. Make female sim eat disgusting foods. 3. If done correctly, the guy sim will think that she is preganant and cheat on her.
WARNING: EATING DISGUSTING FOODS MAY RESULT IN A SIMS DEATH, SO USE THIS WISELY
We have more cheats and tips for this game here, The Sims 2 cheats
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