Isn't the forcetwins cheat only supposed to work on the sim you use it on, and not all of the pregnant sims in your hood?
I'm sure it's way too soon for me to freak out, but this sure is a heck of a coincidence. When I installed OFB, I had 4 pregnant sims in my hood. After installing, I played with a 5th who became pregnant. I used the cheat on her, and saved/exited the game. Over the next few days I played a couple lots in between, then came to one of my already pregnant sims' lot. She had twins. No cheesecake and no forcetwins for her.
This is unusual because I have been playing since last August in Veronaville after a clean install and
never had twins in all that time. Now my first set shows up in my first birth after I use the cheat on a different sim. Please tell me the OFB increased the chances for twins in general. I really don't want 5 sets of twins in a row.