How do Leah and Michel view their relationship differently in the novel, NW?

Unlike Leah, who is hesitant about commitment, Michel is constantly talking about ways to take their lives to the next level. He wants to have children, and believes for the majority of the book that they are simply unable to conceive. He is deeply hurt when he discovers that Leah has been hiding her contraceptive from him. He also wants to buy their own home, for which he has begun investing in the stock market in the hopes of making more money. He is portrayed as responsible, mature, hardworking and devoted to Leah and their life together.