hm it's a bit confusing to me as well.
below is spoiler, I don't know how to put spoiler tag on phone sorry.
her dad and paternal grandmother are real because her mother really married his father and she's truly their biological daughter.
hm saying this, her brother is actually also of wumiao blood! unfortunately wumiao favor women and he probably won't have status or get involved with that side.
it's her mother who was adopted, so the maternal grandparents are not blood related to her. however the maternal grandma is the best grandma how ironic.
in the past there were 3 friends: maternal grandma, the real queen empress dowager, and the wumiao woman. the wumiao woman had a twins and only brought one baby back to the clan. so the maternal grandma adopted the other baby (Ah Si's mom). the other baby in the clan grew up and had a daughter which was the dead priestess (and Ah Si's cousin).
What confused me a bit is the timeline ig. It seems after the wumiao woman returned with a baby to the clan, she returned back and killed the real empress dowager and impersonate her. to be clearer, she killed the woman BEFORE she went to the palace and became the empress. So tbh her becoming empress dowager was kinda her own skill (and wumiao help too). I understand why she didn't want to let the power go.
However it's a bit unclear to me why she dislikes Ah Si so much maybe it's because she disliked her other daughter(?)
tbh I thought it was another wumiao woman who impersonate the queen dowager. it's just seem like it was another person when it's explained before(??) so i also confused.
So the one who knows the empress dowager is the FL grandmother (she adopted the FL mother) and empress dowager is the biological mother of the FL’s mother, she became the empress because as explained Wumaoi intended to replace the empress but the replacement died and they decided to use the FL grandmother because she was the one who trained the (now dead) imposter. And the other grandmother (the short one with white hair) the one that’s greedy is the FL fathers mother (which is her grandmother) hence the FL has technically 3 grandmothers, one not biological, two is biological.
Also the empress dowagar wanted Fl dead because FL resembles her mother(her other daughter), but the Empress dowagar thinks her other daughter who was weak didn't survive hench why she abandoned her with her friend.
Because she thinks the "weak" daughter must be dead, she didnt like FL's mother who reminded her of her living daughter and had her love/ marriage twarted to send her away.
But Fl's mother ended up marrying an official and again entered ED's sight who had her killed, because Fl's mother reminded her to much of her alive daughter and would affect her mission.
In short ED killed Fl's mother, her second daughter but didn't know it was her second daughter.
This is also why ED hated FL when she married the prince, because she looks so much like their "priestess/saint" so she wanted FL dead to. In short ED gets rid of / removes anyone who reminds her of what she left behind for her mission ( her daughter and granddaughter) and ends up killing her second daughter and trying to kill her second grandaughter Fl.
The clan desides to help FL because she is the true priestess / saintess ( her cussing who she resembles had no talent), and because ED never informed the clan she had twins and left one behind who ended up birthing the true priestess/ saint whom ED has then tried to kill. (This has made her actions a danger to the clan, hench they are cutting her off and helping to her demise).
Wait how did the empress dowger become her real grandmother? So the maternal one and paternal money hungry one we know are fake?
Or maybe the maternal grandmother switched babies or saved the mother after the empress got pregnant with someone else and abandoned her? hmm she's definitely hiding something