My wife [21f] gad sex with a older man [53m] and gave birth to 4 of his sons [Age gap]

for context my wife always knew i was a cuck and it never bothered her, sometimes i would ask her to flirt and be touchey with guys in front of me when we are at clubs or bars and she never said no, she never fucked someone at this point and the furthest we went was kissing and letting them grab her ass and tits

this happened back in summer of 2006 we were both 21 at the time, we are from brazil and always dreamed of going rio together, so this summer we booked a hotel there for two weeks it was amazing at the beginning we partied, drank and had amazing sex

My wife and i went to a nude beach one hour from rio , where we met our bull, he was a 50 ish year old guy and was fairly tall, we started drinking and we told him about our cuck fetidh and that my wife has a thing for older men, then things escalated and they had sex infront of me, we exchanged emails and met up alot more times, i saw him plough my wife alot of times in those two weeks

A couple of weeks later we got back to the states and she feels nauseous, we get a test and she is pregnant, we decided to keep it, 9 months later we had a baby boy, we got a dna test and i am 100% not the father, we kept our relationship going with him for 5 years until we stopped my wife got pregnant 3 more times and we did a dna test and i am 100 percent not the dad of the three

My sons are now 17,15,14,12

I dont regret anything despite dna, i consider them my children and my wife and i have not decided on wether to tell them