Ok, I know that a female sim can get a fertility massage from a masseuse, and that it lasts for 12 hours.. but when, did they start making it available on the male sims too ? Tonight, I wanted Vlad...
The only twins I've ever had in game are all natural, no mods or fertility enhancements. I've never had any triplets born in game, but I have had at least 10 sets of twins.