check this out:

        <!--** Dynasty stuff **-->
        <EnableDynasties>0</EnableDynasties>
        <Dynasty_MaxNumChildren>4</Dynasty_MaxNumChildren>
        <Dynasty_ChanceToMarry>0.1</Dynasty_ChanceToMarry>
        <Dynasty_ChanceToGiveBirth>0.1</Dynasty_ChanceToGiveBirth>
        <Dynasty_TurnAgeGrown>100</Dynasty_TurnAgeGrown>
        <Dynasty_TurnAgeOld>600</Dynasty_TurnAgeOld>
        <Dynasty_MinTurnsBetweenChildren>20</Dynasty_MinTurnsBetweenChildren>
        <Dynasty_MinTurnsUntilMarriage>50</Dynasty_MinTurnsUntilMarriage>
        <Dynasty_ChanceToChangeAllegiance>0.67</Dynasty_ChanceToChangeAllegiance>

This is found in C:\Program Files (x86)\Stardock Games\FallenEnchantress\data\English\ElementalDefs.xml

Ive copied the xml into the mods folder and set <EnableDynasties>1</EnableDynasties>.  It does indeed allow you to marry. There is even a cut scene already in place, which suggests it is something they will be adding full features for.