You can sponsor your soon to be husband in two ways.
I hope you realize that with a PR partner and child living in Canada, his chances of being approved for a TRV are actually very low. While he can certainly apply, you really should be prepared for a refusal and plan accordingly.
Based on the old posts it seems they actually lived in separate homes, but just stayed over at each others place a lot. This would not meet the definition of common-law since they had not set up a single shared home together. So I think they are fine on that point.
Yeah, I saw that after I posted this but the Philippines right now has a multitude of spousal sponsorships who are getting procedural fairness letters because IRCC has seen a lot of the same scenarios. Like I mentioned in one of my replies to the OP, who I noticed changed her definition of “living together” when replies to her post told her she will have a problem, my brother was investigated by IRCC quite thoroughly, atleast 3 of our neighbors back in the Philippines informed us that there was someone who actually asked them if he and his now wife lived together. He had the same scenario as the OP where his wife literally lived across the street, the good thing is they really never lived together and our neighbors attested to it. I don’t know if the OP’s neighbors will attest to the same for her and her boyfriend.
