I did send a very similar follow up message, Puppy.
I said to my W's, that I could understand if she's angry but at least now she knows about how bad the situation her sister is in. At least now, she can be there for her. She didn't confide this to you in 1 month. What makes you think she was going to? Would you rather find out that you could have done something to help your sister when it's too late?
I can accept if your angry at me. Fair enough. At least I know that you'll be there for her and puts ease to my mind. Sure, it is a steep price to pay but I'll pay any price to protect my wife and my marriage.
Please remember, I'm her husband. It's not me you have to defend your sister from. The enemy is somewhere else.
You are good sister, my W is very lucky to have you.
F
Damn, son. You STUCK that sucka! Far, far better than mine!