Hi! I saw your post on my threat. Thanks for stopping by In your post, you mentioned that you wanted to talk to someone reading your situation. I think that it is ok to pick a few select people to tell what is going on. You really do need that outlet. But I do not recommend that you speak with your H's sister.
My H's sister is one of my closest friends. We literally talked every day for over a year because we were both trying to get pregnant, dealing with miscarriages and eventually expecting babies less than a month apart. But our relationship changed because of our sitch. At the end of the day, H and his sister are family no matter what. If you talk to your H's sister about the details of your problems, your H may resent you big time.
I recommend that you talk with someone that you are close to. I chose to tell two of my friends. My H was friends with them, but they are definitely more my friends than his. I told them about the situation, although neither of them know all of the details. They are my outlet. They check on me to make sure I am doing ok. Honestly, it just helped to initially tell them what was going on. Try and find someone that you are close with to talk to.
With respect to my H's sister, we talk a lot about the kids, work, friends, etc. H's sister will sometimes ask how things with my H are going because he does not talk to her. I do not complain to my H's sister about our situation and how much it s*c*s. I use it as an opportunity to tell H's sister all the positive things going on. I figure that if H ever talked to his sister about me, I only wanted her to be able to say "She sounds great. Did you know that she is doing ....." Heck, maybe H's sister will even tell H that he better get his act together before he loses me for good. I know that this would be much better for H to hear than his sister telling him that I called sobbing and that I am desperate and want him back. That will get us no where.
You are just started this journey. It is so very hard and long. You are doing a great job. Just keep moving forward.