Given the following context:  The film highlights three different stories. These stories unfold over the course of nine months. Two couples live completely opposite lives of each other, yet share one commonality: an unexpected pregnancy. The main characters, Carmine and Sasha live in a carefree and comfortable world and the arrival of a child shakes up their conventional life: behind their illusion of a fancy condominium and their successful careers hides a couple that is living in pain, secrets and lies. Simultaneously, the other couple within the film, Justine and Seb are freedom seekers that live day by day on the streets of Montreal. These two young squeegee kids live in hopes of a better future, but in the meantime seem to be content with part-time jobs; such as washing windshields and doing small-time deals. Justine's pregnancy catches Seb off guard as he is not ready to be a father. The history of violence in their relationship makes getting an abortion the obvious choice, however things worsen and turn out differently. In the third story, Stephen Decker is a 50-something father who has lost everything, his wife, his only child, and his inner peace. Now he has found a new purpose for his life: revenge, which brings him from Calgary to Montreal as he attempts to hunt down his daughter's murderer. What he finds is far from what he expected, and five destinies converge, for better and for worse.  answer the following question:  Whose life is shaken up by the arrival of a child?
A:
Sasha