It’s normal.
Don’t fall on the fallacy of time invested means you must stand for the abuse, it was 17 years in one lifespan, if she is not worthy, don’t waste another second to her.
Your son, it will suffer initially, but that’s his mother’s doing, he is just another victim. You staying with an unremorseful cheater won’t be any good to you, your son, anyone really.
Cheaters onl understand and fear one thing: consequences.
She cheated, she is dumped. That’s a clear consequence, accountability dropped on someone so broken they dodge any accountability.
This growin up will be a clear message for your son not to follow in his mother steps. To become a self loving, worthy safe partner, not a cheater. Because cheaters end up in the mud like his mom.
When he grows up he will know you left because his mother infidelity.
And he will loathe it.
It’s only good for him.
Unless your wife is truly remorseful and ready to crawl over broken glass, she doesn’t deserve a second from you, not speaking of a second opportunity, a second chance that nobody deserves.
Erase from your life if she is unremorseful.
Evaluate if she s. But even so, betrayal is harsh, you might give a second chance, but is not guaranteed that you will not stand this woman anyway along the path.
About the affair partner, the other guy.
He is a disgusting rat.
Got the chance to squash a parasite?
Is good, as for is worthy to squash any vermin that might infest people’s lives. He is a vermin and will do it again to someone else.
Unless consequences teach him a harsh lesson, he is exactly like your wife, 2 of the same kind, deserving each others, ready to destroy lives for a thrill of dopamine.
I am always for revenge, though is just a vermin, it will give you the satisfaction of justice being served, but don’t expect much from it about your healing, he is irrelevant, your healing is a different path.
You can do it and maybe it will teach this trash person to avoid messing in other people lives, it won’t bring you much good to you. Perhaps someone else’s will benefit from one less rat around.
Beside all the points there is only one thing that matters. Put yourself first.
Heal for yourself and your son.
To hell everything else. It’s irrelevant.
Wife and AP too. They are at the very bottom of the list of things who matter in your life.
2 people chose to become worthless.
Oblige them.
Good luck brother