This is so fluffy!
And no I don't think the aunt was anywhere "bad" or something, she was simply thinking of him.
Sometimes you need to play the role of the bad guy to protect those who are dear to you I guess!
I don't think the aunt is bad at all. For a major decision like that that can completely change the course of someones life I think it's fine to be a little forceful. And when she saw his decision wouldn't change she did give up on it, instead of pressuring him further. His dad on the other hand has shown nothing positive so far.
@Purplelibraryguy
Because, ultimately, her concern and love is for Wahei, who it seems she practically raised.
She's not a bad person, but I think she was convinced that he's been forced into an agreement and has become a doormat. She's basically acting forceful to give him a way out in a tough situation, acting like the "bad guy" so that he wouldn't feel guilty (the equivalent of using your parents being mad as an excuse to not be peer-pressured into doing something you're not comfortable with).
It would've been nice for her to meet the girls, but I think it was better that she didn't until she saw Wahei's resolve. Now she can approach the girls with a more open mind, instead of feeling resentful that her precious nephew might be taken advantage of.
Wahei has most certainly become a better person since starting to live with those three. He deals with customers a lot better and thus gets more positive feedback.