In "Mask" Soo Ae brought in Yeon Jung Hoon into her donation train and betrayed him.
On the episode of SBS "Mask" broadcast on July 17th, Ji Sook (played by Soo Ae) threatened Suk Hoon (played by Yeon Sung Hoon) and started to pressure him.
Ji Sook wanted to stop Suk Hoon who was trying to kill Min Woo. He made a declaration that he would publically donate 50% of the shares. Afterwards, she looked at him during the press conference and said, "Attorney Min Suk Hoon also said that he would give 50% of the shares" and startled him. Suk Hoon tried hard to smile and was brewing in revenge.
Ji Sook said that she knew all of the plans where she assumed that Suk Hon was going to try to kill Min Woo. At this, Suk Hoon said, "So the thing you thought about was this method. To donoate away all your wealth. Just because you want to help a person like me, the world won't change." At this, Ji Sook said, "If a person like you changes his mind, the world won't change. Let's change the world together."
On this day, Ji Sook exposed the relationship with Suk Hoon to her father-in-law.