Your stay in Canada is only a visit - you could indicate "living together" if you were granted at least one year's temporary status in Canada, but don't worry - with
spousal sponsorships, whether you're living together or not is irrelevant. So use a residential address in your home country, indicate in your address history that you're in Canada for now (because you're legal), and don't forget to
apply to extend your status by filing this extension application early enough that it's received by CIC BEFORE your current status expires. That gives you "implied status" to remain in Canada until they make a decision on the extension ap (about 65 days). Submit proof of your legal marriage, and that you have a PR ap in process and sufficient income for support (your husband's is fine to show that you're being supported so you won't work illegally) and you should have no problem being approved.