You always had doubts about this special child of yours. When he was born, he looked a lot like his mother, but he did not look like you at all. You mentioned this to your wife, but she reassured you that you were her only one. So you put your doubts aside. Your doubts resurfaced several years later, when you caught your wife sleeping with your best friend. So, when your wife went out of town on a business trip, you took this child in for DNA testing. The test results came back in two weeks. No, you are not the father.
I see a couple of options here.
1. You want to keep the marriage intact because you love your wife too much, and you want to raise this child as if he were your own. After all, you are already bonded with this child.
2. You file for divorce, citing infidelity as the reason. You then sue the biological father of this child for expenses incurred while you were raising this child.
What other options are there?