Which goes back to the absurd claim you are makingTaunting someone about infidelity is not using insulting or abusive language with the intent of causing alarm and distress.
Infidelity and taunting someone about it is not a crime recognised in common law as you claimed.
I'm not going to bother wasting any more time on you. I have more interesting things to do...
You can only state this if you have a knowledge of the interaction
Please feel free to continue avoiding the fact