If I remember correctly, her father was a prominent affluent person but then got accused of being a North Korean spy and was incarcerated. Big sister's mother had her before she married Mom's dad as his second wife (I'm guessing he married her since his first wife could not have children and yet she apparently ended up getting pregnant with Mom anyways), so he had 2 wives, as apparently polygamy was legal in Korea until the 1960s. Then after Mom's mother died, Big sister's mother conspired to accuse her dad of espionage and when he got incarcerated, took over his assets, married another dude and kicked Mom out. Big sister's mother is technically Mom's stepmother, but concurrent wives usually called each other sisters (yuck), so their daughters called each other's mothers "Aunt" instead.
wowowowowowowo thanks so much!!! now that u mention it, i remember that scene as well haha
so thats his aunt and the family who mistreated him before he reincarnated... okay okay. but how is the aunt and the mother step sisters? and why is jinhyuk's mother stepfather and aunt thieves? and who are those gangsters attacking the store?