Yeah, I feel this - also maybe the opposite is going on? Thinking of the way that, at the marriage meeting, Mama Woojin was implying that Woojin always took what and who he wanted and didn't listen or care about others.
I wonder if she's actually just worried that Seyun's actually being bullied into all this? Maybe her husband forced her into marriage before, and she wants to try and save the next generation from her pain!? (Okay, I'm too invested in this theory now. I just desperately want non-evil in laws in a story) xD