The pair, rumoured to be dating in real-life, peeled off for a romp in 2011 film The Twilight Saga: Breaking Dawn - Part I but producers later toned it down to avoid being slapped with a restrictive R-rating.
And Stewart admits she was surprised to see the final product, as she and Pattinson had gone to great lengths to make the scene as passionate as possible.
She tells U.K. talk show host Graham Norton, "It is a bit full on but it's edited. I see scenes and I think why is music playing over that, I was definitely making sounds and it could be so sexy and it's not. The ratings board breaks it down so technically and apparently, thrusting is a huge problem for the children."