The kids are definitely the losers in all this. They lost a good dad and that makes that bleep happy. IG will have a good life with B regardless but I'm sure he has moments of sadness thinking about the kids.
I think it's probably more "constant thoughts about his daughters and what he has lost" rather than "moments of sadness". These are his daughters, his own flesh and blood, who he loves deeply.
I feel so bad for him, and the children. It's crazy what one unhinged, vindictive person can do. Three lives changed forever, all because a husband wanted a divorce from his wife.