Let's say gnanus and sextus died as infants and by the time he married Julia he had no living sons. Nothing else in pompeys life is different however until he marries Julia. Because he has no male heir he is more careful with her when she is pregnant resulting in her giving him a healthy son. They then have only from that point forward daughters. The trouble arise when grandpa ceasar wants the boy to also be his heir. Pompey says no wanting his only son to be his heir. So how does this go down? Does ceasar relent and adopts some relative like Octavian? Or does this causes a riff between the men causing civil war to still happen?