Olive, how do you define a "disposable " relationship? Is it a relationship where it was clear form the beginning that it won't end in marriage? Or together forever? I do not think this kind of relationship is uncommon at all.

And this girl was a cashier at Carrefour, and not happy with her job. Apparently she did not have an education to find a better job. This guy paid for education for her. Given, where we come from this is neither common nor necessary, but maybe her situation is a little different?
Sure, maybe from our point of what this guy did is something to frown upon, but maybe in this case it was something beneficial for the girl.At least now she is able to take care of herself, instead of relying on a husband or boyfriend to take care of her and her extended family.