OMG Alert: Robert Pattinson and Kristen Stewart Lock Lips on Set of Breaking Dawn

In Breaking Dawn, Robert Pattinson and Kristen Stewart will engage in rough sex. Or pretend to, at least.

But while no still images of that steamy scene have been released, cameras were on hand to snap pics of these stars getting to first base while on location in Rio de Janeiro, Brazil. Take a look at Rob and Kristen, in character, playing a hot game of tonsil hockey over the weekend:

Posted in: Breaking Dawn,Kristen Stewart,Robert Pattinson