What can I do to save my marriage? Help

[Sleepy]

YOU WILL NOT GUESS WHO CALLED ME TODAY!!!!! THE OM WIFE!!!!!
She found out where I worked and had me paged. I had a long conversation with her. My W has another phone and they had a tryst this weekend as I suspected. The OM wife has kicked him out of the house. She found out this weekend. He planned on a golf trip in Phoenix and forgot his clubs the back of the truck. She found his cell records. She caught him lying.

A huge weight has been lifted off my shoulders. I feel so good right now. It wasn’t me after all. She is the demon in all of this!!!

What do I need to do now and how do I confront her with this? I don’t want to kick her out. I might just pretend that I don’t know.

He has 3 kids around my kids age. His wife is devastated. He says that he is in love with her. They have a long history together and were highschool sweethearts. First love. He got her pregnant in HS and they had to get an abortion..... Sheesh.

I NEED HELP FROM ALL OF YOU NOW.