Tiffany, who's currently shooting a new comedy with Kevin called "Night School" ... was at LAX when we asked her about his situation, and whether it's a distraction on set. Based on her quick response ... it's a non-issue when they're working together.
She also says Kevin ain't special -- lots of guys get extorted. Just for, ummm ... different things.
Oh, and for the record ... Kevin's sex tape partner, Montia Sabbag, denies any involvement in the extortion plot.