Okay, kiddos, particularly you surveyed by the Boston Herald who think Rihanna was at fault in the whole Chris Brown beating the bejeezus out of her debacle, here's something you need to know.
There are only two ways this could be Rihanna's fault. 1) Chris learned Rihanna is actually an evil robot sent from the future to kill him and was just defending himself so he could later save humanity from the scourge of machines, OR 2) Chris learned Rihanna had murdered and/or raped a family member.
Now since the two have reunited, I'm guessing neither of those scenarios took place. Hence, it was not okay, and you reading this should know that unless your significant other is either a time-traveling robot or killed/raped your mom, it's not okay to do that. If you're pissed, walk away. Stop the car and kick them out. If they won't get out, you get out. Do not slug your significant other. Do not make their face look like that. I don't care what they said or did (unless it's one of those two scenarios), it's not okay. Period.
And that's my piece.