[joeysteele]

In the usual sense of things the fifteen year gap is not that big an issue except for the fact she is at 15 still under the legal age for sex.
He has also and will likely be punished for it, no matter what the girl says and wants because he has abused a position of trust.

Had she been 17 and him 32, the issue would not have been such a big one,she would have likely been left school then too.
I have a good few relatives where over 12 years difference exists in their relationships and marriages.