There are many ways to have twin or triplets but i don't think there's a cheat for it.
1. Listen to kids music while watching kids TV.
2.Buy the Fertility Treatment with Lifetime Happiness.
3. Eat 3 watermelons in a row for a girl and eat 3 apples in a row for a boy.
Hope you find it useful!
Chat with our AI personalities
You can not even have babies in the PS2 game so how can you force twins
How can I have boy girl twins on the sims 3 pets ps3
No u can't
To get twins, you can use the cheat "forcetwins" in the cheat console after your sim is pregnant.
You can have up to 8 sims per household however if you have 7 sims and 1 of them is pregnant with twins or triplets you can have more.