The culture had to be TOLD it was a holy pregnancy. The scandal would have actually been a witnessing opportunity.
I don’t disagree with all that. I’m just sympathetic with the origin of the idea. It’s not like there biblegateway.com for those folks to consult. If they had a hard copy of scripture, then they were extremely fortunate.
So, the easy mental dodge is that she became a holy woman and didn’t engage in that stuff anymore....or something like that.