To Love A Pauper

Donald, a poor boy in a forbidden love with sandra from a rich home. At some points, he lost hope of being with Sandra considering the fact that he cannot contend with Mrs susan and Alex the rich guy.
How did Donald and Sandra fell in love?
What uniqueness does Donald have in the class?
Was Mrs Susan able to stop the two lovers?
What is the fate of Mrs Susan?
Did the love end in fulfilment?