I think he does cause he texted erm... the MC while texting his mom, and the notification time was too on-point, so he probably figured it out. At the same time, they VC a lot so he should put two and two together.
The madeline incident, the similar voices in VC, and the notification when he texted him. Lots of things together.
the how actually will be revealed later, no use in trying to understand now
Lol yea can't wait to see it through jigu's pov
Does he know? How? Since when?