It wasn't anything planned. It was a series of necessities. Guns moving into town, a hero going to greet them, the perpetual firefight, the worried computer lass who sent in backup. It was only natural that Oracle sent her boyfriend in to safeguard her best friend.
There were shots, and fights, and explosions, until both heroes landed somewhere in Gotham harbor with shore too far away. It wasn't planned. It wasn't a secret rendezvous. Simply a series of events. Her gashed shoulder, his torn costume, the chilly Autumn air setting in, carried in on harsh watery breezes.
It was morning before they were found by Batman. They didn't speak of the night. They didn't tell the smiling redhead the next morning as she fussed over their wounds. They recounted the heroic events not quite meeting her eyes. According to them, it hadn't happened, despite memories of the night prior.
They smiled at her, watching her joyous expression because they were alive. They hid the guilt they were feeling. It wasn't planned, but it had still happened. They could chalk it up as a moment that never was, which is exactly what they did.
Until a week later, it happened again.