I think the interesting thing is that some of those with sympathy for Jezza are ignoring the context here, he didn't meet some "grown up looking/acting" girl in a club with a fake ID. He met her in a classroom, she was wearing a uniform FFS, surely he knew her age from day one and his job was to check homework not start having sex with her and then whip her off to France...
We've touched on "emotional maturity" in this discussion, I think it's worth considering what that term actually means. To my way of thinking it's being able to think beyond your instinctive emotional responses to any given situation and temper your actions based partly on your emotions but with consideration of the consequences for yourself and any others involved.
14/15 YO girls are typically the centre of their own universe, so it's to be expected that she'd not fully consider the fallout of her actions, Jezza on the other hand has no such excuses, married for a year, employed in a position which required responsibility and care for other people's children and their education, he knew far better.
The "People in love do kerazy things" defence is pretty weak, immature people thrive on creating drama and crisis but seldom solve it.
A (married) Teacher who engages in an inappropriate relationship with a pupil has ignored the consequences for himself, his pupil, both of their families and anyone else close to either of them.
That level of impulsive immaturity is, particularly in this instance, criminal IMO...
The longevity of their relationship is immaterial, if they're still together in five years time it doesn't make his conduct six years earlier any more excusable.