Brandon Blackstock quietly hung out with his former stepmother, Reba McEntire, less than five months before his death. Brandon and his half-brother, Shelby Blackstock, reunited with McEntire, 70, and her boyfriend, Rex Linn, at RodeoHouston in March. "Family time, the @rodeohouston and corn dogs," Shelby, 35, wrote via Instagram on March 5.