Did you notice the Danger Days option within the cheat menu? It is placed with pregnancy options ... but not related to her menstrual cycle ... by default it is disabled (False) ...
It enables (True) or disables (False) random encounters with bad guys ... as long as enabled, the chance for bad events increases gradually until it reaches it´s peak after about 2 weeks ... as long as disabled, bad things will almost never happen, unless you beg for it (naked,horny,wasted) ...