It was difficult to be a married and a Biochem MSc student. Depending on what you study you will have to dedicate your life to your studies. I don't know of any supervisor who treated gradstudents as regular employees. You will never finish a graduate degree if they do. You will be expected to work on weekends + at night and you will want to work extra to finish. Speak with your supervisor, make sure you are both clear about how much time you are expected to work every week in order to complete the program in 5 years.