Basically , I think the twin sisters are working with the girl he is cheating his wife on with and they schemed for her to get framed about having adultery , that way her reputation will be ruined so she will commit suicide (like in her past life) and the scum will be able to be with his mistress . One of the twins lure our Mc’s sister to some chamber where there’ll be a man waiting for her and the 2nd twin lure other people to say she’s having an affair

i love how she says "i understand evtg now" while I only grow more confused one panel at a time ╮( ̄▽ ̄)╭