In a desperate attempt to secure the alliance Lexa and Clarke got secretly married right after Finn's death, before they left to Tondc. What started as an obligation lead to something more but ended up in heartbreak after the events on Mt. Weather. What neither expected was that Lexa's words lived up to their promise - they did meet again. AU from 2x16 on.

Even now, Lexa still trusted her. All Clarke wanted was to take that trust, break her of it. To make her hurt as she did. Love is weakness, Lexa had said so herself. Clarke would make her weak.