Wouldn't this blow up easily? I don't get what she's planning here

I actually think she's rushing things with this just bc she said that in the future this vassal will embezzle an accumulated of 10m?

And i would've liked if MC would've just caught him doing this instead of her framing things

Yeah I do get that, I know she's doing this because this is actually something that that clone of the mother does when she's grown up and gains the trust of the dad, but just how is she gonna make it work