I feel like he must’ve thought it was a traumatic pregnancy and tried to block it out.. that’s the only way I’d rationalize waking up pregnant with no memories on how.
He had so much going on, severe injuries, amnesia, a pregnancy so he was really vulnerable. I’m pretty sure that the creepy Hyung guy steered him in that direction knowing that he was susceptible to manipulation at that time, though we still don’t know why. He was able to survive in relative isolation without finding his ideantoty because that guy made sure all of his necessities were taken care of. After he helped so much, of course mc wouldn’t be so ungrateful to question or suspect such a kind and selfless savior. Plus the constant exhaustion from recovering from injuries, pregnancy, childbirth, and raising an infant would have constantly drained his energy and focus, allowing the thin veil of deception to remain uninvestigated
If you wake up in the hospital one day with no memories, and realize you’re pregnant…. why would you not try to remember?? It just doesn’t make sense why he’s so against it