I think it’s natural viewers are confused and it’s a bit polarizing in It’s Okay to Not be Okay that female lead Moon Young’s psychotic and sociopathic mom is back, but the writer paved the way from the very beginning so it’s not one of those last minute scares. Moon Young is so messed up she didn’t just grow up in a ordinary abuse level of family abuse, and the Moon brothers running away constantly from their mom’s murderer is a key component in how they grew up. Neither can truly heal unless those two issues are resolved and it’s both tied with Moon Young’s mom. So the healing we’ve watched up until now is the two leads trying hard to find happiness, but the drama is finally giving them the catharsis and freedom to do so now with full knowledge and truth between them. I love that. Moon Young grows empathy, putting Kang Tae first, and Kang Tae learns to take what he wants and the happiness before him inside of restraining himself. The two have changed positions and this whole episode was like replaying the early scenes of the drama with the roles reversed. But for Sang Tae oppa his growth has been one way only, the way of maturing and being the catalyst for all that is good that happened to Moon Young and Kang Tae. No wonder Dr. Oh said that Sang Tae could one day save Kang Tae. He has certainly saved them all.