If somebody could find exactly what Harry has done wrong in Queens regs
I think Section 69 of the Army Act may, at a stretch, cover it, "Conduct to the Prejudice of Good Order and Military Discipline", except it all happened in a supposedly private environment.
I'm of a similar age to BEagle, (I'm 1941), and am definitely on Harry's side, it was supposed to be in private and none of our bloody business.
(Harry's father, a commissioned officer, committed several times what was once a Courts Martial offence that would have cost him his commission, adultery!).