It doesnt matter how they were physically or socially.If the guy married her and vowed to be there for"in sickness and in health, for richer or poorer" He should have been man enough to stand by that. If he thought that the marriage was doomed, he should have gone through the proper channel and called it quits and then moved on to another person.
This however does not mean that Im condoning what the woman did(commit murder). To me personally she simply handed her life over to a lost cause...and commited the biggest sin. She should have thought more of her own self and less of the hurt that was caused to her.Life sure isnt fair all the time.
I dont know if it was a crime of passion or crime that was thought of in detail and was preplanned.She did the wrong thing and should be punished for what she did. If emotions were to rule what we do …and if such a grotesque action was not punished then every other spouse is going to take the law into their own hands and then plea that it was a crime of passion or whatever. Life happens humans need to deal with it and move on.