I think NYCB was probably not as vigilant at the time. They started dating before the Martins allegations came out.
At the same time, if Waterbury was no longer a student at SAB when they started dating, how much say can NYCB have in who their employees date? I can see the company being able to place restrictions on inter company relationships as that could be an HR issue, but can the same be said for dating people not affiliated with NYCB?