I figured that Chai switched the kids, but I'm confused whether the mother is aware that she gave birth twice. So was Wat and Thaet born on the same time/year? I caught up with the episodes and I am obsessed with this drama!So latest episode just revealed that Chai used IVF to have another kid which is really Thaet. His revenge was to basically switch kids. That’s why he hates Wat/Alex so much since it’s not his real kid. So Thaet grew up without his real dad but still loves him cause he raised him.