In my heart of hearts, I feel very sorry for the young couple, particularly the young man as in this country it would have been legal. But this is the problem, they are not in this country and you have to obey the law of the land you are in.
That said, based solely on what I have read in the newspaper reports, if they are to be believed, the girls mother is clearly seeking revenge and not justice, she waited until they got home to notify the Dubai authorities thereby protecting herself when she made false claims of rape and basically outed their relationship internationally. Well done on humiliating your own child and having a young man incarcerated and leaving him to deal with a record of sex offender for his entire life.
I'm not sure what lesson she thinks this teaches her daughter.....but she needs to know that if I was her daughter, I would be hanging my head with shame, not because I had consensual sex with a young man but because she is my mother.