I think Ripley's mistake was trying to be kind to Rose.
If she had actually tried some villainess lines like, "Never approach me or the Duke again, or I really will be after your throat," Rose might have taken it seeing as this time she genuinely looks like she's scared of the consequences.
But by flaunting your good relationship and going, "I'll be kind, aren't you pitiful chasing after a taken man?" that's got to be really humiliating right? You came all the way here after I almost killed you, and you're going to take the high ground and make it look like I'm the pitiful desperate one? You're here to show off how much better you are than me?
If it's someone proud and easily provoked like Rose, that's got to be what's going on.