Implies two things with the 1st one being the most obvious one (for now, with the info we have). Which fucking sucks for Naoomi. Like real bad. (Unless dad didn't want Naoomi to enter his fucked up family)
There was no will.
Who wrote it?/Who knew first?
If Grandpa did, how long has he known this? Or was it the wife...
Why? Was it guilt? They could've just had them informed about the death without any more knowledge, no drama.
is it really that Yuzu isn't his child and they wanted a male heir, but that doesn't make sense tbh since he already has a young son, who is more in line for the inheritence, unless adopted.
why does the mom have the upper hand if she's the one hiding a secret too. why does grandpa look like he's the one with even more secrets.
There was a will giving him more rights.
Valid assumption but really doesn't make sense if you think about it:
if they were in the place to replace the will, they could've just deleted the will and not inform the illegitimate family about anything, easy peasy, without drama.