as long as their goals don't endanger the crown and everyone's interests remains aligned, she's cool with nobles prioritizing tending to their own gardens.
letter-wise, while una keeps meticulous records of who's banging who, she really only gives a crap about what people are doing with their genitals if it's relevant, endangers the stability of the nation, or can be leveraged to maintain/benefit the stability of the nation. so she's an unlikely candidate to have informed her. since causing strife in or dissolution of her marriage would open her up to pursue other suitors-- such as her new engagement. which she can do better than bastian by the way, seriously girl he is such a tedious manho let her find you a better hubby.