The Ending Of Out Of My League Explained

When Arturo agrees to a dinner date with Marta, he brings her home to meet his parents and it becomes clear that he did so purposefully — he doesn't get along with his parents, and knows that Marta's eccentricity will put them off. It seems to work, as even when Arturo and Marta start falling for each other, his mother rejects the idea and doesn't think Marta's good enough for her son.

After Marta and Arturo have their big fight, he becomes visibly dejected and his mother sits him down to have a talk. She originally thinks Arturo broke things off with Marta, and even says it was "cruel of him to lead her on," without realizing that Marta was the one who ended things. When Arturo explains that he was dumped, his mother reveals the story of her and her husband's romance, which her father didn't approve of. She and her father became estranged when she refused to break up with her future husband, and their fight lasted until her dad's eventual death.

The moral of her story was to remind Arturo that, even despite his rejection of his privileged life, he always has a choice as to where he wants his future to go. He then decides to follow his heart despite what his family thinks, and he and his mother also embrace warmly before the film's end.