Is it normal to not know your mother

I'm the oldest son to my father, but from a different woman than his five other children

My step mother never loved me. She prayed for my death my whole life, except for one night. I was terribly ill and she wove this child doll dream catcher thing that was supposed to protect and save me. But the next day she went back to hating me

My father ended up dying about ten years after that. He worked in government and did his best to serve the people. His best was so good that the corrupt politicians had him killed, publicly and in broad daylight had his head cut off

Right before he left to work in the city that killed him, he saw me off to work as a watchman for the border wall. I asked him about my mother, but he said, "the next time we meet I'll tell you about your mother"

I've gone on a few reconnaissance missions for my job, my life's definitely been on the line a few times. My camarades even tried to assassinate me, but thankfully a red woman was able to save me

And now, I have a new alliance with old enemies, my new enemies sit in cells, and all I can think about is my mother!

Who was she? Why wouldn't my father tell me about her? I even wonder why he couldn't have had me with his wife. He was in a war at the time, maybe he thought he was gonna die and just decided to have one last time with a woman. But he was such an honorable man, that doesn't make sense

Ugh, will I ever find out