I just don't know if you should bring it up. If I knew, I don't think I could keep it in (H had A, but finally confessed it before I had any concrete evidence). I am so sorry you now know the truth, but in a way, its freeing. Makes you feel less crazy for thinking it, huh?
I wonder if your SIL will just go ahead and let her know that you know.
Of course, in the 'real' world, we all have the right to bring things like this up, but when we are trying to keep our marriages together, these things have to be well thought out. I am a very inexperienced DB'er, so I hope someone else can help more!
