Well said, 2tp. This is painfully true in my sitch. H told me my mom was part of the problem and it is definitely a roadblock to a R.
Its a double-edged sword with telling people- you need the support, but on the other hand it makes things uncomfortable when you put all of the players in the same room again. For me, it was something of a relief to get it off my chest and feel like I wasn't 'hiding' something. But it also created a different dynamic with H and I, and in some ways pressed the issue.
I would think long and hard before getting anyone else involved.