Another bug. Can not wear black garter
I had same problem, and couldn't find a fix or the original file
So I removed the condition for black garter in MAP004.json in www\data
but it's not a real fix, because you can use it even if you don't buy it
about the missing buy_sex12_b8 or other b8 files, it seems to be a bug if you die while pregnant, the NPC don't change and scenes that doesn't exist while pregnant can be triggered this way, but pregnant graphics don't exist.
You can just copy the "buy_sex12_b7" file and rename the copy to "buy_sex12_b8" and it will let you continue.