The rising action of the story is not caused by only one character's motivation.  There are two characters and they come to conflict. 

On the one hand, Mrs. Jong wants to take pride in Waverly, her daughter.  Mrs. Jong spends considerable time teaching her about life.  For instance, in the beginning of the story, Waverly admits that her mother taught her the art of invisible strength - a way of winning arguments and respect from others. As the story progresses, there are more hints that show that Mrs. Jong supports and helps Waverly.  Mrs. Jong give Waverly a good luck charm, sews her dress, and rearranges the house to help Waverly practice chess. 

On the other hand, Waverly wants to be more independent.  She does not like her mother looking over her shoulder.  She is actually getting bitter, and at one point she tells her mother to back off.  When she and her mother go to the market place and her mother starts bragging about her, Waverly complains and a conflict starts.  The conflict is bad enough that Waverly runs away. 

From these two points, the motivation of Mrs. Jong is to take pride in her daughter.  Waverly's desire is to be more independent.  They collide; that is the rising action.