Who was God's other kid?

Some scholars say it was Lillith, Adam's first wife.

LOL Its sometimes hard to tell when you guys are serious

Okay lets have a look

Rev 12:1 ¶ And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars:

Rev 12:2 And she being with child cried, travailing in birth, and pained to be delivered.

Rev 12:3 And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads.

Rev 12:4 And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born.

Rev 12:5 And she brought forth a man child, who was to rule all nations with a rod of iron: and her child was caught up unto God, and to his throne.

Rev 12:6 And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and threescore days.

This is a figurative (spiritual) comparison between the birth of Christ and the birth of the Christian church. The "woman" described here is really the Christian church. She fled from the devil and he chased her. God protected her from the devil for 1260 years (a day for a year Bible principle). Then Christ married his Christian bride. See that in Rev 21.

Keep studying!

The book of Revelation is fiction. Don't waste your time and effort on this book. Instead read the teaching of Jesus recorded only in 4 books of the Bible - Matthew, Mark, Luke and John. Jesus taught us about God, God's kingdom and about the only way to God's kingdom. Jesus taught us that only by doing what God wants us to accomplish for the benefit of humanity, we earn our citizenship of God's kingdom.

Revelations is talking about Jesus and his mother Mary. The dragon is satan, the stars are 1/3 of the angels that were cast to earth with satan.

You are way out in left field. I suggest that you find some of your own age to discuss this with, as you probably would not like adult answers.

Reread the whole Bible all over again.