Will point out that Saburo is a bastard, especially after nearly 80 years I'd think Hanako could realize her father is a demon in his own ways, then there's the whole, if you didn't save Goro it's clear she either doesn't care enough to update V or forgot about them in the Devil EndingThe fact that they didn't care is what really makes it funny.
It does make Hanako's reaction more funny. Oda kept thinking of her as an innocent but she didn't care until her brother tried to kill her (or so she thought).