Buy yourself the Lifetime reward fertility treatment! u may even get triplets! enjoy!
OR
Eat an even number of apples for twin boys, and a even number of watermelons for twin girls
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.