Maybe she does not want her kids to swear by the Quran cause she is asking them to lie and she has fear of making them take a fake oath upon quran
I'm trying to convince myself that she is not lying and will not make her children lie, but maybe in actual fact she is. Who knows what goes through peoples minds, I've tried to squeeze out the truth as much as I can.
But even if they are telling the utmost truth, should she have a problem with her children giving sworn evidence? Maybe Im missing the point, could it be a personal thing?