After quick check of the docs and a test, it turns out when you use Master Controller on a pregnant sim, there is a section under "Basic" for "Baby". That has options to set the gender of the first child, and to set the percentage chance of a multiple birth. Menu path: NRaas > Master Controller > Basic > Baby. Docs on the different baby options
If it is simply one sim you are concerned about, you can toggle the aging via the following : Install DebugEnabler. From the Sim Menu, navigate the menu "NRaas \ Debug Enabler \ Options: Sim \ Aging \ Allow Aging". Doing so will toggle the aging flag for that one sim, turning it off if it is on, and vice versa.
If the file is not stale and there is no other game folder, then the next thing to try is pull your entire user game folder out (or rename it) so that a new one forms on the next startup. The game folders are designed to be swappable, you can always put the original one back. Back out of the startup (quit), set up the Mods Framework on the newraQBh.