Both the brother and sister knew they couldn't say this out loud, they just thought they'd see when the time comes. If the school starts and they haven't returned, they'd have their parents help take care of the kids for a while. After all, when they both go to school, it's not feasible for no one to look after the children, so it had to be this way.
Now seeing their brother-in-law so anxious, if they were to say anything at this point, who knows how much more anxious he'd get? In this situation, they just needed to agree, because that's the only way to reassure them.
"Brother-in-law, you and my sister can relax, we'll take good care of the kids, you can focus on what you need to do, just be careful and safe. With us at home, you don't need to worry about things here." Qin Yu was quite steady in his actions, so his words were also meant to reassure Chu Molin. After all, this was not the time for uncertain answers that Chu Molin might not need.
