I was watching the movie 300 and wondering what would happen to an illegitimate child born to a Spartan queen. In the movie, Queen Gorgo was raped by a councilman because she wanted him to send reinforcements to help Leonidas. Since there was a sex scene in the movie indicating that Leonidas and Gorgo had sexual intercourse the night before the battle of Thermopylae, either he or the councilman was the father if Gorgo got pregnant after the ending of 300. Both men were killed in the movie, so it would be difficult to tell who the father was.

I know Leonidas and Gorgo only had one son according to history, but I wonder what would happen to illegitimate children in the Spartan royal family, especially when the biological father was not the king. What would happen to the kid if Gorgo (or another Spartan queen) got pregnant and not sure who the biological father was? Would Gorgo claim that the kid was a posthumous birth of Leonidas even though the kid was probably from an illegitimate pregnancy? Would how well the baby physically is determine whether he or she would be killed or not, regardless his or her potential illegitimate status?