Im still incredibly lost
so as me ┑(￣Д ￣)┍
If you have noticed , no one ever mentioned that Ellen is Katherin's dauther aside from Ellen herself who call her "Mother". Neither the headmaid(Linda) nor this f**king bastard guy did (in fact he said himself she isn't his daughter) nor Kathering's ghost( who called Ellen "the child" , not "My duaghter") . In chapter 21 ,during one of Linda's flashback, when Ellen was born Katherin was in from of a mirror then Linda annouced her Ellen's birth (it was their mother who gave birth to Ellen). If you look closely in the familly photo , you can see 3 people sit on chairs ( both parents and the bastard) and Kathering kneeling next to their mother and Ellen in their mother's hands.
Also in the begining of the story when Linda introduced Marie to Ellen ,she mentioned that Ellen was the heir. Also called her "Lord Rose's *only* daughter". But after the recent chapter, I suppose that this "Lord Rose" is the Previous lord Rose (their Father).
The current Lord Rose (the bastard guy) took the name of the bride familly name (Aaron is actually trying to do the same)
So he isn't her father but her brother-in-law and Lady Rose is her sister (but she doesn't know any of this). Ok now I see the picture.
So this guy in order take the Rose family's fortune maried(parents's choice) Lady Rose but and unexpected turn of event ocure, that is Ellen's birth. So his plan of getting the Rose familly's wealth didn't gone well even after Lady Rose's death( suicide ? assassination ?) and now try to control (kill) the actual heir which is the sister(Ellen).
Still , why don't they just kill him ?