It is too quick. With an applicant from the Philippines, you will have a hard time convincing the visa officer it is a genuine marriage.
Your ages are actually a plus - you are pretty close in age, the man is the older one, and you are both mature.
The brother is probably a plus - family in Canada can make it look like the applicant just wants to join his or her family, but since it is just one person this makes that motive less likely. Try to have and maintain a good relationship with the brother, with proof, because showing that you have met each other's family is considered good evidence of a bona fide relationship.
I think if you get married 10 days after actually meeting each other, her application will be refused, so you will have to appeal or reapply. My suggestion is to not marry yet - meet her during this trip, get to know her and her friends and family, gather a lot of proof of your time together (plane tickets, boarding passes, receipts for activities done together, and lots of photos). Then go back to Canada and continue your relationship long distance. Continue gathering proof: phone each other a lot and use some method that will provide proof. You can print out Skype records, for example. Use landlines for phone calls, or a cell plan that will show the numbers called, for both you and her, even though this will be more expensive. Phone cards as proof are useless in the Philippines. Send emails, letters, cards, and save copies of everything.
Then go and visit her as often as possible, keeping proof of everything. After 8 months or a year of this, then get married and submit your application. I know you don't want to wait, but doing it this way will end up being faster than marrying and applying right away, getting refused, and having to appeal.
