No, he did not.
yes, he has a adopted daughter called Maryanne
No, a man cannot commit adultery with his wife. In order to be adultery, it has to be with a woman other than your wife.
Yes, a man can commit adultery anywhere (even in Kuwait) if done in secret. However, it is to be known that adultery is forbidden and not allowed in all God religions including Islam. It is also illegal to commit adultery according to Kuwaiti national law.
You commit adultery every day when you look at someone or something lustfully. You also do it when your mind is impure or you have impure thoughts. And, obviously you commit adultery when you have sexual activity with someone who is not your wife or husband. This how adultery is commuted.
to not commit adultery
You don't . . . that is adultery. When you were married, you promised never to commit adultery.
Probably not the same mistress that he commited adultery with.
It actually does not say that you have committed 'adultery'; but states that you commit it -- 'in your heart'. Anyway it's in Matthew 5:28