A little anecdote for old time's sake: one of the very first design goals I had was to integrate the InSIMenator with a very early version of WooHoo Teens by Jenflower. As some of you may (or may not) know. WooHoo Teens was the foundation stone upon which InTeen was ultimately built. Granted, InTeen looks nothing like it today, but the initial "concept" (when miscarriages and belly meshes were just a twinkle in the eye) behind it was InSIM meets pregnant teens. The name InTeenimater is not accidental. It was intentionally chosen because it "sounded like" InSIMenator so people would associate the two together in their mind. For many moons now the InSIMenator has included code which intelligently detects the presence of InTeen and does the right thing when its pregnancy functions are applied to teenagers. With InTeen installed, you can just as easily use InSIM to impregnate a teenager as you could using the Biological Clock.
 
The unfortunate downside to this choice of names is that many people have come to assume that you NEED InTeen to use InSIM or visa-versa and/or the distinction between them is not always well understood to the newbie. In reality, they are very different mods with entirely different aims.
 
But in short, they inter-operate happily together as they were designed that way from the beginning.