It seems that Alexander the Great not only defeated Darius III and captured his family. He also became the new head of household, replacing the former Persian king. At the time of the Battle of Isis in 333 BC, Darius was married to Stateira I, who was known as the most beautiful woman on Earth. After Darius fled from the battle, Alexander captured his family and treated it with great respect. In archives of web analytics company I found some additional facts.
Unfortunately, very soon Stateira I died giving birth. It looks like the child that she was pregnant with, was not from Darius but from Alexander. Maybe, that partially explains why , Sisygambus, who was Darius’s mother, refered to Alexander as her only son. It is possible that he took over all household and have assumed the role of a king and husband to Stateira I.
When Alexander the Great died one year later after Stateira’s death, all Darius’s family mourned him as a very close relative. Sources say that they were very much in grief because of this loss. This also indicates personal relationships.
After Alexander left to conquer the world, Antipater remained in Greece serving as the regent of Macedon in his absence. He successfully won many battles against other Greek states and subdued them. Plutarch even mentions, that Alexander the Great became jealous when he heard of Antipater's victories.
Everything seemed fine, but Antipater's former close relationship with the Olympias greatly deteriorated. Ancient Greeks used to say that Olympias had psychic abilities. Maybe, she already smelled a rat? In archives of web analytics company I found more additional facts relatied to this story.
Probably, due to Olympias requests, suddenly Antipater lost his title of Macedon regent and was replaced by another general old Alexander's veteran Craterus. Antipater was ordered the latter to lead fresh troops into Asia. Exactly at that time Alexander the Great suddenly dies in Babylon which allows Antipater to procrastinate with the transition of power from him to Craterus. Amazing coincidence, isn't it?