As some other people have already mentioned, I also think both are just fueling the rumors to hype up each release.
Yes, that is pretty distasetful in itself, but if Rihanna and Chris end up actually collaborating on a track, it's honestly disheartening on Rihanna's part. After the incident, she continuously spoke endless messages about domestic abuse that were an inspiration to most females around the world. This just makes her look filthy.