Sorry about your brother, that's a hard blow to take. It does make him free to find his real partner in life though. : )
I'm about ready for my siblings to give up on spouses and spend their lives helping somewhere else. Our preacher has been preaching on this the last few Sundays. Basically, he's said people have to stop thinking the grass is always greener on the other side of the fence. My sister has been married 4 times, this is my brother's second. Maybe God has something else in mind for them to do.