So the thing she's most worried about when she leaves is Cohen's family coming, because that's the last thing she wants to see happen.
This is the part that she finds troublesome; therefore, she hopes that if they do come, it's when the two of them are at home, and not sneakily taking him away.
"Don't worry, they won't secretly take him away. Don't forget, Cohen is registered under our household, and if they take him away without our consent, we can sue them," Chu Molin thought. If it were really that easy, wouldn't the world be in chaos? So not everyone can just do that.
Of course, if the other party has significant status and can handle things swiftly, that's a different story. But Cohen has been away for so long, and despite all the missing person notices, no one has come to take him back. If there were anything, isn't this rather unlikely?
