After going through two affairs (over 10 years apart), I've decided that what is rebuilt is a different type of trust. It's never the same. It's trust in oneself to be strong and solid regardless of what difficult situations my family might be going through. I now try to give love without expectations... because I don't know the future. Life is short and anything can happen. My marriage can end tomorrow. I could die in a car crash... anything... The trust I give my husband is more a hope. I have to trust that if a situation does occur where boundries might get crossed, that he will realize the foolishness of it and ultimately make the right choises, which is to be with his family and a wife who has loved him for more than half his life.
There is no arriving, ever. It is all a continual becoming.