Holiday or business trips are allowed:
Common-law partner
You are a common-law partner—either of the opposite *censored word* or same *censored word*—if:
* you have been living together in a conjugal relationship for at least one year in a continuous 12-month period that was not interrupted. (You are allowed short absences for business travel or family reasons, however.)
You will need proof that you and your common-law partner have combined your affairs and set up a household together. This can be in the form of:
* joint bank accounts or credit cards
* joint ownership of a home
* joint residential leases
* joint rental receipts
* joint utilities (electricity, gas, telephone)
* joint management of household expenses
* proof of joint purchases, especially for household items or
* mail addressed to either person or both people at the same address.
(
http://www.cic.gc.ca/english/immigrate/sponsor/spouse-apply-who.asp#common_law)