Episode 21 - S1.E21

Gye Hwa finds out that Gi Chan actually is her grandson through the DNA test that she processes. However, she's not ready to let anyone else know about it. She still denies her blood relation to him when talking to Goon Ja. While at it, she also makes the rest of the family think that Goon Ja had developed dementia, making her a not-so-credible source of information.