Pls help--confused and fearful

[P17]

Where can I find info on doing a plan B letter? Like, what needs to be in there?

Here was my Plan B letter:

"
Dear W,

I am writing to you about our current situation.

I can no longer stand by and accept your affair and pretend that we are still a happy loving family.

I have decided that there should only be contact between us for two reasons. To either discuss the reconciliation of our marriage or the potential end of our marriage. The first one I can't discuss while you have invited a third person into our marriage and the second one is best left to solicitors, I think.

I have asked IM to act as an intermediary between us. This will protect D and I from any unnecessary contact. You can either speak or text IM on <IM's mobile>or email her at <IM's email>.

In the meantime, D and I must move on with our lives without you.

Yours sincerely,
"