She is partly right. Michael played a role in the secret lasting as long as it did. Sure. Nina could have ended it at anytime but Michael blackmailed her and sat on the intel for 3 months. If not for Cyrus, it would still be a secret. He’s no hero in this but he was the final domino that forced it out. I mean Lois figured it out but Nina was on her way to tell Sonny.
“For disclosure here. Ned knew and used it to his advantage to blackmail to get intel to take Michael down. Michael knew and blackmailed me to control my access to my daughter and grandkids.@
Bottom line for me. There is plenty of blame to go around. Nina is responsible for the SEC *factual* tip but she did not prevent Mikey from telling his wife and mommy.