I've asked myself all the same questions. How does someone who vows to be true to you, and love you and honor you all the days of your lives---how do they feel that it's ok to break your heart in tiny little pieces. How can they feel it's ok to pull their love from your heart, when you've done all you ever could do to be there for them. Why, why, would anyone jeopardize their family, a child included, for some cheap slut? In my case, he cheated with her, broke it off for 2 years (I thought things were going along peachy). and in those 2 years she became pregnant with her 4th child by an unknown person (to me). Why would he go back to such a situation. I don't think I'll ever understand it. Some people are just "broken in the head." I don't want to be one of them.
The saddest thing, is that I still love who I married---and when he acts lovingly, I just cave. It's hard to get over. I'll pray for us all! God bless us, everyone.