idk how logic works in these cases, I've seen in other manhwas too how when someone comes along the way claiming to be mc or wtvr the plot is about, like in this case, the daughter, and then the family suddenly starts seeing mc as fake and as someone who had been deceiving them, like how... shouldn't there have been some sort of emotional connection between mc and the family for all those years that they spent together as a family even if in the end she was not biologically related to them?
like in,
Actually I was the real one, Death is the only ending for the villainess, The Real Daughter is Back or There is no place for Fakes
(some of the lists here does not actually go with the storyline of mcs being kicked out but more like the og plot was of them getting kicked out for being fake)