Jon remembered all the things his father has done to his mother. While he treated Jon well, he was extremely unfaithful to his mother. From sleeping with the secretary at work, to the neighbor Ms.Choi, and even with his Mom's sister!
Jon's Mom knew about it, but didn't say anything because she thought it would be hard on Jon and his siblings, but what she doesn't know is that they hate seeing her suffer like this.
But now Jon has the wishing rock and he just thought of a perfect way his mom can get revenge.
"I wish....."