True, but then again, not much of a risk.

Her family are loyal to Giebe Kirnberger who in turn is loyal to Ehrenfest, Kirnberger is almost as far aways from the Ahrensbach border as you can get, so if you combine the distance with how tight the timing until the attack is, even if somehow the information is leaked, there’s near enough no chance of it arriving in Ahrensbach in time to make a difference.