I was trying to make this same decision about getting my now separated W to go to Retrouvaille with me. I spend a couple of days reading as many posts as I could about it and my conclusion is that it works wonders when BOTH spouses are willing to consider reconciling, but it is largely unsuccessful when one spouse is already walking. Based on your description here I'd say your W is not ready for Retrouvaille, and it sounds like she's not interested in it either. I'd let it go and not mention it to her again unless she brings it up. Personally I decided it was too much pressure to put on my W right now since we just S, so I decided not to bring it up.
