As to your BIL - I really do hope you can offer some things to help them. Things we ALL wish we knew sooner. It kinda depends on your (or your H's) R with them, and if they know about your sitch, but either way I think you could help a bit. I wouldn't even say you noticed anything was "off" - just offer the tools to help them keep their R happy. For example, do you think giving them a copy of 5 Love Languages might be good?
I gave it to my bro and SIL for Christmas and just said "I wish I'd had this sooner, it's great!" They knew about my sitch at some level although we hadn't separated yet - and they really appreciated the book. And funny, when I first mentioned the sitch to them my bro was in shock saying "OMG we ALL go through the same crap!" So I guess things weren't rosy with him either, and I had no idea. Now they are much happier, seem closer, and are talking about starting a family. Not saying it was all 5LL by a longshot, but I think it got them jumpstarted a bit.
I wouldn't pull out D-Busting yet if they aren't even married though.
Me 35, H 38; Together 13.5 yrs, M 7 Bomb 1 10/07/06 Sep'd 1/14/07 - 4/15 Piecing: 4/07 - 9/07 Bomb 3 10/11/07: Never loved you, let's separate 2/08 slowly improving 7/08 Piecing (7/25/08 rings back on!!) Current thread