Would you stoop to the same level behavior as your former ex as a payback?

Or that is low and you will never do that you are much better and smarter than that?

I have a 28yrd old cousin who like 3 months or 4 mos ago separated from her husband. They dated for like 7 years and got married in 2019 and separated this year like 5 months ago but it seems as husband and wife they were separated much longer and since the family did not know about their status, they still attended family gatherings together pretending they were still a couple and it was all fake, the reason the family did not notice anything wrong. But during the family get togethers they did act strange but noone thought or noticed that was strange.

For instance at gatherings each one arrived separately and left separately and the excuse for the husband to arrive at different times than her wife was he had work to do or attend work related things the same excuse when he left first at family gatherings, always was "a work related issue" but noone thought or even notice that was strange. Unfortunately the daughter followed the same steps as her mom (my first cousin) she got separated from my cousin`s dad when she was very young, the difference here is that this cousin did not have kids with her husband.

Anyway, some family members started to noticed something about my cousin husband behavior and why? Because the dude posted things on FB that people could see. The husband as stupid as he was, started to post FB stories (those stories that dissapear 24 hrs later from the account) with photos of him and another woman. That is how I noticed somethign was wrong. It seems the mother did not even know her daughter was having relationship problems, because her daughter kept things from her, even if mom and daughter had always been super super close. So the dude started to post photos of him and this other lady several times.

SO when things im sure got out of hand for this dude because people started to ask him

Updates
4 mo
how come he is posting photos of him with another woman if he was still married, he had to face the music on social media to stop speculations and rumors from people. So he texted a public long text explaining to his contacts (including my family) what was going on with the photos.

More or less he said on that public text that due to rumors and gossip he had gotten from people he needed to straight things up and indeed he was already in another relationship and already made a new life with
Updates
4 mo
another woman as he and my cousin did not have a relationship anymore for many months ago (like a year I believe) but they had now just a cordial relationship to each other he unquoted. This new lady has already a daughter from a previous relationship.
It seems my cousin is started to do the same thing as her ex, posting photos on social media of her and a male friend at the beach. My cousin is at the beach and she posted a photo of the 2 of them next to each other smiling.

Would you stoop to the same level behavior as your former ex as a payback?
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