I guess, I think there is more to whether someone is a 'minor' or not. Different countries have different age brackets for 'minors' - it happens to be 18 in the US. But I know 25 year olds that have the maturity and confidence of a 14 year old, so I would consider them to be just as vulnerable despite their age. And vice-versa. I would see this situation as abusive based on the woman's vulnerability level, not merely her age. So that's why I'd not be too quick to jump to an abuse accusation just yet.