Oops, he did it again: “Lost” star Naveen Andrews, apparently not entirely clear on the definition of a monogamous relationship, was caught on film in Manhattan Beach performing mouth-to-mouth on an unidentified blonde woman who was not his longtime girlfriend Barbara Hershey (and who was also not, for the record, in any danger of drowning).

This is not the first such indiscretion for Andrews, who made headlines back in January for fathering a child during a brief period when he and Hershey had been “on a break.”

Here’s hoping Hershey wasn’t paying too much attention during those torture scenes last season…or Naveen (whose rep insists “Naveen and Barbara are still together”) may have a rather uncomfortable homecoming in his future.