My mistake, I think the "abuse of trust" argument applies to teachers or social workers.
I don't know what the position was/is regarding adults in a consensual relationship who don't have a "position of trust" over their partner.
Anyways, Lily Allen is a good example of a "case-study".
https://www.independent.co.uk/life-style/love-sex/lily-allen-dad-virginity-police-b2394106.html