Is this worth saving, or am I only fooling myself?

[Dash]

I've got another question.

According to what I've read, exposing the affair to her family is something I should do. She told me that they know about it, but I don't believe they do. I don't even think they knew she was getting an apartment just from their reaction when I told them I had taken her to sign the lease last Saturday.

How should I bring it up? I'm not really close to them, and maybe they do know. But my W is really good at telling lies and avoiding things (Scarlet O'Hara Syndrome?).

Any ideas? Should I really do this or will it only cause more trouble with me and W? I believe her older sister knows, they're really close, but I know her younger sister didn't know until I told her. But she (the younger sister) won't talk to me now.