You're a married man living a normal life. What you do with the people you meet along the way is entirely up to you. Will you be a good husband? Will you stay faithful? Will you bang every chick you see? What if you are put in a position where you don't have a choice?
In order for you to be able to install this game, you need to enable (allow) installation of applications from unknown sources (Unknown sources) in the phone settings. Usually this item is in the Security section