Fai Sin Chua (2020)

-Complicated family tree
-Absolutely vicious revenge plans
-Mothers/MIL have relationships with their child's love interest

If you're like me and love morally-ambiguous messy dramas, either of these will do it for you

I didn´t watched neither until the end, but it really felt similar.

-The plot is all about revenge
-We have crazy mothers and women in generel
-Both of them are alot about families and how bad they treat their children
-The Male Lead is a bit flirty with the Female Lead and kisses her forcfully sometimes
-In both the Female Lead stands behind a family member, even if they treat her like literal trash (In Fai Sin Chua it is her mother and in Hua Jai Sila her mother and sister)
-**We have a kind woman, that dies because of the mother**

not similar plot, but:
***same actress and actor as mains and almost same chemistry (Bie Thassapak & Fah Yongwaree)
***love triangles, love squares
***in both dramas major part of plot is infidelity (in both ML has mistress, in one drama our FL is wife, in another mistress)
***in both dramas mistress becomes quite obsessed/afraid to lose ML in second half of the drama.

The both have the same actress and actor, and they face similar problems like nabi getting treated badly and in general they just give of the same vibe