Lieutenant, when Captain Andreyasn traveled back in time he changed our future. Your future, and mine.
I've read the debriefings from that "alternate history," and yes, you and I kissed.
Neither Schlock's debriefing nor the one from the alternate you explain why you and I kissed, however.
Maybe that version of you finally listened to his heart.
For my own part, I suspect a head injury, or maybe pheromone darts.