How to have twins on Sim 2 (pc) ?

I have the sims 2 pc just the regular one not the other ones like season.Well i wanted to know how i could have twins I have tried everything like forcetwins twinsr2cute.I really want my person to have twins i have even tried whohooing alot when she pregnant and nothing happens. I tried holding shift down and clicking the girl but it never gives me the option to Debug:Forcetwins what section do I go to for that like tombstone for L and d or whatever it is