Serena and Venus Williams’ half-sister Sabrina condemned Will Smith’s act during the Oscars and added the Hollywood star should be stripped of the Oscar. Smith, who won the Best Actor award for potraying Richard Williams in King Richard, got mad when comedian Chris Rock made the joke about his wife’s condition. Rock made a joke about Jada Pinkett Smith’s alopecia, and after initially laughing at Rock’s gag, Smith got up and slapped Rock in the face. “Keep my wife’s name out of your f—— mouth,” Smith could have been heard saying to Rock after the slap. “So Will Smith got angry, went overboard, and assaulted another person. Then you just can’t apologize two minutes later, you lost your mind. Wow,” Sabrina Williams said in an inter …