This is the definition from the Operating manual (
http://www.cic.gc.ca/english/resources/manuals/op/op02-eng.pdf). Reading the manual helped me out a lot when determining what evidence to provide...
5.35. What is cohabitation?
“Cohabitation” means “living together.” Two people who are cohabiting have combined their affairs
and set up their household together in one dwelling. To be considered common-law partners, they
must have cohabited for at least one year. This is the standard definition used across the federal
government. It means continuous cohabitation for one year, not intermittent cohabitation
adding up to one year. The continuous nature of the cohabitation is a universal understanding
based on case law.
While cohabitation means living together continuously, from time to time, one or the other partner
may have left the home for work or business travel, family obligations, and so on. The separation
must be temporary and shortReading above, it's debatable whether the 6 week break will impact the common-law status or not. Is it possible for her to be away for less time?
I think what is key is for you to be clear about why your partner needs to be away for 6 weeks, and your reasons for not going with her. They may question why you do not want to be together during the holidays, so be explicit about your reasons for not going with her for part of or all of the 6 weeks. Also, keep evidence of communication between one another while she is away.
Evidence is key, so read through the manual and supply as many of the items as you can... read section 5.26 for the types of things they want to see
Good luck
