*Former couple Chris Brown and Rihanna just quit each other again – this time on Twitter.

Just days after she tweeted him a happy birthday message, the two are no longer following each other.

The reason? According to E!, Brown released a freestyle version of Kanye West’s “Way Too Cold” (formerly “Theraflu”) last night, he could be heard rapping, “Don’t f**k with my old bitch/It’s like a bad fur/Every industry n***a done had her/Shook the tree like a pumpkin just to smash her/B**ch is breaking codes, but I’m the password.” [Scroll down to listen. Warning: NSFW]

Speculation quickly began to run rampant that Brown was referring to Rihanna. Apparently, she thought as much, as she immediately unfollowed him.

Soon after, Brown himself stopped following Rihanna, as well as tweeting out the following regarding the rumors: “Assumptions! I didn’t say any names so if u took offense to it then it’s something you feel guilty about.”

All of this comes less than three months after the two joined forces on remixes of each other’s songs.