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Miko created a topic of Welcome Home, Papa

Okay hear me out.
Like ofc the mom and the daughter are horrible bcz they obviously have ulterior motives and theyre obviously the antagonist here
But what about the husband’s sister? Why would she go on peeping his brother having sex with his lawfully wedded wife and why would she make a big deal out of it? The husbands family dont know the mom-daughter duo's true nature yet theyre antagonizing them for no reason. I think i hate the sister for prying unnecessarily into their sex life