BRITISH hottie Amara Karan, who shares steamy kisses with Jason Schwartzman in `The Darjeeling Limited,` which opened Friday, hopes everybody sees the movie - except her mom. The Oxford grad told `She`s Sri Lankan and quite conservative. If she were to see that kissing, she`d be horrified.` Karan, who`ll next play a bad schoolgirl named Peaches in `St. Trinians,` began as an investment banker out of college but switched to acting. `Mom was absolutely devastated,` Karan said. `She`s waiting for the day I pack it all in and go back to finance.` That won`t happen, she assured us.