The main targets for this kind of thing would be the Queen, Eileen, Hanastrew and later on in my novels, Jenny, once she becomes aware she is half-magical.
Kiss and tell is unlikely to happen to the Queen as any offences against her risk the offender falling foul of the Treason Act and facing death. (Obliteration by wand is the most favoured method of execution and the Queen has carried this out directly in her younger years as a Princess when one or two thought they would try it on. They found out the hard way she was not that naive).
You would have to be insane to even think about trying Kiss and Tell on Eileen.
Hanastrew, though a fighting fairy godmother like her mentor Eileen, would be more at risk. Hanastrew is pretty, adores things like chocolates and roses (though she does not show this in front of the fairy squad mainly out of fear of mockery), and could be susceptible to the charming rogue. It is one of the Queen's (and Eileen's) worries that this could happen. Hanastrew would never deliberately do anything that could cause embarrassment to the realm but this would be the way to change that. It has been suggested that given Hanastrew is like an officer of state, offences against her should also come within the Treason Act, but this has not gone further. There is a kind of feeling that if this is mentioned openly, Hanastrew might react badly (i.e. the "do you think I'm an idiot" reaction). The realm wants to avoid this. Offended fairies and other magical beings have a historical habit of showing that they're offended and the realm has had enough of this in the past.
Jenny, on the face of it, is protected simply by being Eileen's daughter but there is a risk someone might use Jenny to get at Eileen. Both women are aware of this. Jenny however has only eyes for one man, her husband, Paul and finally Eileen can see there being some point to the marriage she has never approved of.