Those are the red strain of Trichogaster labiosus, the thick lipped gourami. They can grow up to 4" long, but 3" is more common. They are called "honey gouramis" in shops, but they are a completely different species & grow much larger than true honey gouramis, Trichogaster chuna. Yours definitely look like a pair. Good luck with them!
If they breed they breed. I'm not going to try and get them to spawn. Someone was bubble nesting the other week but it could have been the betta.
There is no way to remove the other fish unless I want to break the whole tank down.
It would be easier to remove the fry and rear them in my shrimp tank lol