Would you like your partner to betrayd you? I am sure a good woman will never like her husband to be taken by another woman and vice versa the good husband will also never like another man to take his wife.
If you steal something from some one then yours will be stolen another day.
Let us be good and wish happiness for the married man and woman.
If some one is not married I will tell him God bliss you and let others live happily and you will take what is decided for you sooner or later.