Yeah, with the rumors and things getting out of control, this will definitely push Ma Ri into some sort of action that she can't avoid, sooner or later. Knowing the white haired vampire, instead of threatening the blonde, he'll likely say that he's Ma Ri's fiance to her, just to keep the blonde happy and possibly the rumors in control.
If that happens then the blonde will also have an another secret that she could also exploit, since Jae Min doesn't know that Ma Ri is "engaged" to someone. The author has definitely stepped his game up, and it's turning into something completely and the direction is taking interesting turns.
Here's
chapter 70 raw in case if you're interested. Be sure to tell me what you think, I'm sure you'll be pleased with the way it's heading currently