Aphrodite,Helen and Eris at the wedding in the Greek god world Eris throws the Apple causing chaos and trouble at the wedding.The three goddess's grabbed for the apple claiming that they were the fairest of them all.
Zeus thundered he had had enough and made Paris choose who the fairest of all the goddess's were.All three goddess's wanted Paris to choose who was the fairest out of the three.Paris choose Aphrodite because she was the most beautiful goddess in the land.
Aphrodite was chosen as the fairest of them all and crowned the most beautiful goddess in the land. She kept her promise to Paris though she was really smart and knew that Paris was very foolish.
Paris put a spell on Helen to make her fall in love with him he enchanted Helen so she didn't know what she was doing. He kidnapped her and they both ran off to Troy expecting to live happily ever after.
When the King of Sparta found out that Helen was kidnapped he sent the other kings of Greece to come for Helen's rescue. They railed on a ship to save Helen as they were instructed by the King of Sparta.
When Helen got to Troy with Paris she was no longer known as Aphrodite's half sister she was just....Helen of Troy the woman who caused destruction to the city state and to her ex sister Aphrodite.