I'm really wondering how that phone call went down, since it's this MC we're talking about he probably didnt keep a single thing under wraps. Something like, "Goodafternoon Mrs. Saki! I'm calling to inform you that a certain girl had confessed to me today, and since i can't bear to reject her I've decided to two-time your daughter with her! But don't worry, I've asked for your daughter's permission and we're now planning to all live together in my house since I live alone, so it's all fine! Please give your permission for your daughter to live with us!"