I'm dying to know if S did get in touch with the T.
Like you, I'd follow the Shirley Glass line of no contact/friendship with Swiss Miss. There has been so much betrayal of you in that "friendship" that I can't see how it's possible for Swiss Miss to ever be a part of your lives. Of course, my perspective is 100% influenced by my thinking about OW in my sitch and my H going on about a friendship with OW in the future.
My big challenge has been putting up a boundary without my H feeling controlled. The only thing that has worked so far has been to emphasize that *I* can't bear the pain of H being in contact with OW. That way the whole talk becomes about what I can live with as opposed to telling H what he should or shouldn't do.
While your thinking about Swiss Miss sounds spot on, I don't think it will help for S to hear it from you (probably not for the first time). Let's hope that you get to see someone together before your trip. By the way, when do you leave?
Wendy
Me: 51 H: 52 T: 23 yrs M: 19 yrs S18, D16, S14 (special needs) PA: 2003/2004 Piecing: 2004 on Suspect H had EA: 8/2012-12/2012