So it was the Lord's plan all along, and he... didn't bother to tell anybody, not even his... spymaster, who would be the one he should trust to change a, to be frank, fairly idiotic plan such as this into something workable?

The daughter's player is right, this sounds like a guilt retcon.

You should probably be happy, since the new situation lets you actually play your character in a meaningful way, but still... what an awful plan that put the Lord's closest family in danger for absolutely no reason.