This can happen regardless if you're editing the save file, it happened to me after reloading a save during a playthrough
I found out some cool stuff while using the editor tool you mentioned
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You can actually get the game to show her pregnant, you even get some extra dialogue with the fisherman, and it will be reflected during the bar scenes.
It was weird because in order for this to happen, I had to add some unused items to the inventory using the tool you mentioned, and I used the Potion of Fertility just before the sex scene with the Fisherman, which guarantees pregnancy 100%; right after that I went to the bar as usual and came back home, which triggered another cutscene with the husband where she gets him drunk and pretends to have sex with him. After that, the screen goes black, and some text tells you a few months had passed, and bam, there you have it.
You can even get undressed from harassment by the customers at the bar, but you can't get drunk while pregnant, so I couldn't get her FULLY undressed, but it needs more testing.