I am not entirely sure if I got it right.
You are not speaking about financial infidelity now, but about your husband betraying you with prostitutes right?
Full blown adultery if that’s the case, no matter how minimizing the cheater is with "it’s just a…"
It’s just nothing. It doesn’t matter what sex act or emotional act is involved, once you cross that boundary is infidelity and it’s all the same.
The just thingy is a justification the cheater tells himself to deny they are a PoS and still a good person, if they can gaslight you into forgiveness by "accepting the is just a… new boundary".
And this guy also betrayed you financially before.
He doesn’t care about you, and for sure you deserve better.
Now you need to tell because the weight of feeling alone is crushing you.
Here you can freely get it off your chest and finding people who will hear you, understand you and advise you.
Anonymously so there’s also that protection.
Now friends and others.
They could be helpful or it could backfire.
People who have not been hit by infidelity tend to react differently than what you need because it is a very uncomfortable topic to discuss.
Best case you get stupid platitudes that help you nothing and make you feel stuck.
Worst case it gets out of control and you can’t get it back once it is out.
Therapist suggestion to wait has merits, you will share with friends (make sure the right kind of friend) when you have regained your center at least in part and have more clarity.
Not because friends are bad, betrayal trauma can only be healed by yourself, when you talk to friends what you do is talking to a mirror and the friend will somewhat mirror your own clarity engaging with it. This very moment they can only engage with trauma and that is not what you want to see reflected back. Not now at least.
Unless you have someone who went through betrayal already, in that case they can help you.
Here you also have a lot of people of that kind.
You have been heard and you will survive this.