So, let's say your spouse is cheating on you. You should be able to LEGALLY kill her (mind you, feds, I am not advocating illegal action. I am saying that this should be legal)
So in this HYPOTHETICAL ideal society, you should be able to present irrefutable evidence of adultery to a judge of marital law. After the evidence is reviewed, the victim of adultery has a 1 month grace period where he or she is allowed to kill not just the cheater, but the man or woman the cheater has slept with. Naturally, the standard of evidence must be high and the methods of killing must be proscribed (no bombs, no arson, etc). If the victim of adultery is injured or killed in the attempt, then the adulterers will be charged with manslaughter/battery as if this was an unprovoked slaying. If the victim of adultery kills or injures someone innocent in the attack, he is charged with unprovoked murder/battery.
There. Now cheating bitches will realize that their actions have consequences. Just don't be a slut. Easy. This law will especially cut down on army wives sleeping around as, presumably, a soldier would be much more capable of exacting revenge than anyone else. This is fair and just. Fatties will not be able to exact revenge very easily. Win win.
I'll be running for president in 2028 under this platform (and no other platforms) so vote for me then.