Was she really Adam's first wife?
Thanks for your question.
The Bible knows nothing of Lileth. The Jewish legends about Lileth say that she was the first wife of Adam, before Eve was given to him. However this contradicts the Bible teaching about Adam's wife. Further the mythology surrounding Lileth further compunds the point that the whole story cannot be true.
Genesis 2:21 And the LORD God caused a deep sleep to fall upon Adam, and he slept: and he took one of his ribs, and closed up the flesh instead thereof; 22 And the rib, which the LORD God had taken from man, made he a woman, and brought her unto the man. 23 And Adam said, This is now bone of my bones, and flesh of my flesh: she shall be called Woman, because she was taken out of Man. 24 Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh. 25 And they were both naked, the man and his wife, and were not ashamed.
Genesis 3:20 And Adam called his wife’s name Eve; because she was the mother of all living.
Matthew 19:4 And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female, 5 And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh? 6 Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
1 Timothy 2:13 For Adam was first formed, then Eve.