They'd run into each other's arms and hug, Ladybug was sure. They'd hug and hug and not want to let go, but they wouldn't need to let go because they knew who the other was.
They wouldn't need to hide their identities. That was obvious, but it felt important to Ladybug. To her, and to Chat Noir too, it meant that there would be no more secrets between them, so they would be able to knock that damn wall down.
Ladybug had been wondering to herself about who he was beneath the mask. He would still be her Chaton, no matter who he was, but she had a weird feeling that she knew him, without the mask. Chat knew her beneath the mask, Ladybug knew that, and she thought that her and Chat's future relationship would be a lot like that.
Two people who just understand each other, and are willing to do anything for the other.
Just as they are now, Ladybug realised. They weren't in an official relationship, and she had no idea when they would be, but she was sure that the love that flowed between them would be more than enough.