I'm not sure what you're asking, Dude. IMO, if R isn't going well, it's time for a heart2heart with a 'change or D' ultimatum/choice.
Both partners on SI can work if you set the rights rules for each other. I really hate to see partners post on each other's thread if they know that's what they're doing. If the partners don't know that they're both on SI, it doesn't matter, IMO, if they post on each other's threads. That rarely happens, though. IIRC, I was asked if it was OK for my W to join - but I didn't know her ID at first. She kept forgetting mine, but we R'ed anyway.
Also, I think it's OK if they use SI to help them decide between D, R, and waiting.
In our experience, I suggested my W join early, but she said she'd leave it as my safe place, although she might have been afraid to join. Eventually she wanted something from me that I wasn't willing to give, but I thought fellow WSes might help. W joined; said the responses to her first post were 'harsh' - maybe she said 'sort of harsh'.
(She hung in though.)
SI threads are 'works in progress'. We post about our problems much more than about our solutions. If my W read my first few 1000 posts, I believe she'd have thought I was uninterested in R and only forcing myself, because I posted about problems in R. (Remember: our posts generally say a lot about ourselves.) It would have been easy to not see that I was looking for solutions.
Our rules were that we would stay out of each other's threads. That is, we'd stay out of any thread that one of us started. We also agreed to avoid reading each other's posts. Because we both read for content, it turned out to be easy to read each other's posts, but I know if I recognized her style or what she shared, I'd check the authorship and stop reading if she was the author.
Our rules allowed each of us the privacy to post about our problems expecting that we wouldn't scare each other. That's of paramount importance.
Also, I HATE to see a couple conduct a he-did-she-did fight in a thread.
*****
Occasionally a WS or even and ap reads their BS's posts surreptitiously with the goal of gaining power over their BS, especially in a D.
For that reason, I recommend a lot of caution in informing a WS of SI's existence.
SI works best when members can be honest, sometimes brutally honest, in what they write. The more one censors, the less help one can get.
A few SIers have good reasons to regret letting their WSes know about SI. OTOH, many couples have benefitted from being here, when they decide on strong boundaries.
*****
SI is like peer counseling. I had a great MC, and she did things SI can't even dream of doing. SI can do things an individual C can't dream of doing.
Our MC vetted SI when I mentioned it. She said it looked good to her. She sees it as additional support, not competition, even though she doesn't always agree with stuff I picked up here. As I say, she's a great therapist.
[This message edited by SI Staff at 8:00 PM, Wednesday, January 12th]