Vol 7: Ch 558 – Are you fighting? 2
Hearing the twins asking Mei like that everyone except the babies and the Din's twin's attention, all of them are now looking at Mei. Lyn didn't see anything wrong but not for El and Aya after all they know Mei very well. El already notices this one earlier and En answered that they are not fighting so he didn't indulge himself anymore after all it's their own marital problem without knowing that he is the main reason why Mei starts doing what's the proper wife to do on his own point of view that cause for them to be like this. As for Aya, she already notices this one from the day Mei didn't tease En and she didn't voice out her opinion because she doesn't want to be a noisy one of her daughter's married life and they are both mature enough to face their own marital problem. The same with Rei since she also notices this one from day 1 but didn't voice it out including today because she's in a hurry.