There’s anothe rhollywood example of this in a little known film called My Chauffer...It had deborah Foreman in it IIRC...
It illuded to an intimate encounter, where the two actors realized they were “bad” (brother and sister) before they actually knew they were related...
You’d have to watch it, but it just seems to me mistakes can, will and have happened in real life, and all you can do is kinda go “oh well”...Whatya gonna do???