(After that question, I'm good. I can't remember, but recall there being 2 large mirrors on the second floor. If they say 1, one of the mirrors was put there after presumably things went south. Ergo, it's a definite trap. If 2, then it might be worth going back to check out, cause it could be something helpful at that point.
Seems likely the basement doesn't have a monster in it either. Rather, the "monster" was a guise to hide the occult rituals.
I have a sneaking suspicion based off the less than positive look of the "mother" (probably step-mother actually?) in the portrait we saw, if i recall that correctly as well that is, the death of these two may have little to do with the cult. Possibly killed by mother herself after new baby was born.)
(@drafter- can any of the above postulates be investigation checked for accuracy? Or is that not how the skill works? 😂😂)