Let you and your spouse be a loving example that abstaining from premarital sex does not lead to a disputatious, boring married life. You also must not take your marriage for granted. It is also important to remember that you must share your marital happiness with your child, but never your troubles. Teens have enough troubles of their own, without having to help you with yours. They depend on you and your spouse to be a constant example of what marriage should be.
Teens are prone to think that that there is no reward for leading a moral life, except boredom.
It is your job to show them that the instant gratification of which our society is so fond pales in comparison with the sense of achievement and happiness that results from knowing that you lead a righteous life. Of course, there is more to faith than happiness, but at this stage in their lives, this is what teens most respond to because although they're growing, they're not yet grown. Show them that you are happy with married life. Be an example of trust, love, happiness and faith to your child, and he or she will follow your lead. This is truly the high road of parenting, but being an example is the only road for any parent who is really concerned about the welfare of the child.