I know and understand the the painful betrayal you are agoing through.
I completely relate to the feelings of agony, anger, fear, uncertainty, and distress of being betrayed by one who vowed to protect you.
It is indeed traumatic to go through such an inconceivable backstabbing as this - especially when you have been married for so long and have children together.
Something you must understand right off the bat is that your wife’s behavior and betrayal are not your fault -at all.
Your wife’s infidelity has nothing to do with you or your marriage - nothing.
Her reasons for doing this are all internal to her and even though you have been married for a long time, these reasons have always existed within her - even before you ever met her.
It was not about anything you did or did not do nor anything you said or did not say.
Let’s be clear on something - you have NOT been emasculated.
Your masculinity is NOT determined or validated by your wife nor any other woman - period.
Your masculinity is NOT determined by your wife’s loathesome behavior.
You and you alone are the ONLY one who determines what sense of masculinity you desire to live.
The only humiliation to be felt here is the extreme humiliation that your wife has earned herself.
You have done nothing to feel humiliated about.
As far as asking questions about your wife’s “sexlife” with another man?
Look, she doesn’t have a “sexlife” with this other man.
It is an arrangement - it always is.
The arrangement is that the other man provides cheap and disingenuous “compliments” to her and she in exchange provides sex to keep the compliments coming.
She is in an endorphin and dopamine-filled fantasy world and she has been providing sex to keep the fantasy-high going.
My ex-wife acted exactly the same as yours when it came to telling me anything about what had been going on in her fucked up fantasy world.
She would tell me it was none of my business, get angry, and flee to the also-adulterous, alcoholic, and toxic people she convinced herself were “friends” so that they could give her all the shitty excuses for why none of it was her fault.
It was all a complete and nonnegotiable dealbreaker for me.
She was so far over the line when it came to the infidelity, the lies, the deceit, the disrespect, contempt, and wanting to pretend nothing happened that there was no going back.
All that said, there was never any time I felt emasculated or humiliated on my part - not at all.
I was true to my vows, true to her, true to our marriage, true to our family, and most of all, true to our children.
To this day I am proud of how I conducted myself during our marriage, during her fucking nightmare betrayal, during the divorce, and after the divorce.
I maintained my integrity, my dignity, my honor, and my self respect.
If you are able to keep true to your self and maintain your self respect then you have nothing to feel emasculated or humiliated about.
There is no getting around the pain of betrayal such as this but your honor and integrity are yours alone to determine.
Hopefully, she will open her eyes and see the horror of what she has done and move mountains to save her marriage to you and her relationship with her children.
But, from what you initially describe, it doesn’t bode well.
I can tell you that my ex-wife maintained this flippant asshole attitude towards me all the up to the point that she got my divorce filing - then I got the tearful phone calls wanting to talk.
I was way, way, way too far gone at that point - no going back for me.
As others may say here, you must be willing to end your marriage in order to possibly save it.
Best of luck to you in whatever course you decide to take.