Let me just say this: Song Fanghua's family is absolutely disgusting and I love that the book doesn't pretend otherwise.
Her parents Song Weiguo and Zhao Guilan are the worst kind of people — they sold her into this marriage for a factory job connection, and the second Zhang Yong dies, they're already calculating how to get her money. The scene where they whisper outside her door about 'treating her better' so she'll 'let her guard down' gave me actual chills. This is textbook emotional manipulation and Fanghua sees right through it. Her inner thought — 'With these two top-notch parents, could their acting skills even compare to Song Lili, the reborn woman?' — is absolutely peak. She's playing the same game as her sister, who is also reborn. Two reincarnated people in the same house and neither is telling the other.
And Song Lili herself! She's the 'perfect younger sister' who cries and adds fuel to the fire, but Fanghua knows exactly what she's doing. When Lili twists Zhang Yong's story into him being a hero who rescued someone from the moat, Fanghua internally rolls her eyes because she knows the REAL story — the girl jumped in to escape Zhang Yong's harassment. This sister dynamic is so much more interesting than it first appears.
Then there's Wang Cuifen, the dead groom's mother, who storms in screaming and trying to physically assault Fanghua. Fanghua dodges her slap like it's nothing. The woman has reflexes. And Li Youde? He's clearly the main antagonist in the making — manipulative, scheming, using his position to benefit his own family while pretending to be neutral.