Maybe the whole attitude to cadet relationships has become nonsensical, especially when it gets to this sort of situation.
The arbiter regardless of in house rules is parental view, if the parents are happy with it, then that's the end of that. As stated under 18s can get married to anyone with parental consent, it would be an interesting situation if this happened in the Corps and the Corps said you can't be a member of Corps anymore on some nonsensical pretext. The media and a number of political groups would have some fun with that. I would like to see a 16 year old marrying a 21 year old both in the Corps. A five or more year age gap is not unusual in relationships and marriages. I can see something wrong with U16s and much older people, but purely from the perspective of the putting up with teen mood swings. Living with teenagers is a nightmare at times so anyone being in a relationship with one, would require sectioning.
Our in house rules should be in line with the laws of the land and as long as those aren't being broken then nothing said or done. Over 18 cadets not being able to drink when on cadet activities is another piece of nonsense. I've never stopped them with the caveat don't get trollied and be fit for the following day, just like staff. I'm surprised we don't ban them from voting as we don't consider them 'mature' enough to be proper adults (against pretend adult cadets) in the Corps and so can't possibly be mature enough to vote. God knows what they made of 16 year olds voting in the Scottish Referendum.