I figured it was too soon to resolve that particular plot point, but goddamn gramps. What good was your secluded cultivation if your son could just coldclock you so easily?
Well, that was a dumb thing to do. He should of just went and brought back the MC like her said he would... And is he really that weak? Looks like somebody has been scheming.
If the family knows that the daughter and her friend look alike... someone impersonating her isnt so strange. The only strange thing is the birthmark but it could potentially be a tattoo.