The 100: As Long as You're With Me
This story may evolve into a Bellarke fan fiction for all those Bellarke fans out there. ;)
Believe it or not, wanting to tell everyone on the Ark about the system failure was not Clarke's first act of treason. Her first was knowing about Octavia Blake and not telling anyone. It was so long ago, Clarke had forgotten, but Bellamy never did. So when she gets kidnapped by the Grounders, Bellamy rushes to her rescue despite all their past disagreements and the fact that her being out of the way meant he could have done whatever the hell he wanted.