Unfaithful

Last night I watch a movie on TNT entitled UNFAITHFUL. The movie was about a woman who had a husand and a son. Both parents had good jobs and they loved each other so much. One day after work, the women went to a shop to buy so staff she will need in preparing birthday party for her son. She happened to miss her train. It was a very windy day that was not siutable for walking. She tried to take a taxi home and she could not get any of the taxi drivers to stop. Blinded by the wind the women bump into this guy who was carrying a lot of books on his arms and they both fell on the ground.
The wind blown away most of the staff the women bought from the shop and she ended up having a couple of cuts on her knee. She apologise to the guy and begged him to get her a taxi to go home. On able to find a taxi for the lady, the guy told the lady that, if she won't mine she can come with him to his apartment. Where she could use his bathroom to clean up and take care of her cuts, after which the wind might have settled and she could get a taxi home. The lady went with the guy and cleaned up herself and her cuts. The guy had alot of books in his apartement, which made her thought he was a libarian or something.
He made her a cup of tea and when she was about to go, he asked her to take a book with her to read. The next day, she pick the book on her way to work and a card fell out of the book with the guys name and phone number on it. She called him to say thank you and he invited her for a cup of coffee at his place. To make a long story short, this women started cheating on her husband with this guy. She went so far with this guy that she did not even felt like making love with her husband.
So many questions came to my mind after watching the movie, and some of them are: Why do we get marriage? Is marriage something everybody have to go into? Why do people cheat on their partners in relationships? Is it okay to cheat in a relationship at all? Is it because people are not satisfied with what they have in their relationships, that make them cheat or what? What can be done to make people stay faithful in their married or even unmarried relationships?
These and many more were the questions that came to my mind. To anyone who will read this; if you happen to have answers to some of these question, please write back.