I'm going to tell people I had an affair when I divorce my wife
Did you really have an affair?
No, I'm going to tell people I had an "affair" with this sexy newscaster on TV.
It's a normal feeling to feel jealous or to feel betrayed by your significant other, but actively lying to people and actively saying that you had an affair is very immoral and a deplorable thing to do. If you have already divorced your wife, I would suggest you just move on and find someone else that you will be happy with in the future, instead of being petty and plotting very inappropriate things to do to make your ex-wife jealous.
That bitch ruined my marriage. I'm going to make her look like a whore.
Well if you say you cheated don't you think you will be the whore? Lying and keeping secrets is wrong in a marriage, you should be able to trust eachother.