Responses
The Prince mentioned, that if Mildred has no money, she will have to sell their home, and the dude wants to buy it. So, he robbed her of her income.
Because he can't step in that boundary yet. MC gave signs she's no interested in remarriage. Also, not exactly a spoiler??? but he needs the mansion to confirm something for heavily plot related reasons
Lemme guess, he wants to keep the painting as ransom in exchange for the mansion? So why not marry into the family? Or his ulterior motive itself has another ulterior motive???
I'm in inception y'all my brain is so fried right now....