They also did not need to know that when the Prince and the princess visited the Duke and the Duchess, Vivi and Nami were more than friendly.
And the servants were paid enough to never tell anyone who exactly shared a bed with the Duke more often than not.
His marriage to nami was a practical decision, an agreement. She loved money and he liked a drinking companion from time to time. They did not feel anything towards each other but the society did not need to know there was no heir in sight.
Than he could have hoped for. He also meets sanji and suddenly he gas the cook helping him take kuina from pre-school, cooking him lunch and just... Being there for no ulterior motif?
Thinking hard about zoro being a single dad after he lost his wife kuina in a car accident. He was left recovering from terrible injuries and grieving his wife all the while trying to take care of kuina when suddenly luffy enters his life. And with that he gains more friends