09e4cafc_tions___Crusader_Kings_II_Wiki__Requirement
[Ambition] Marry Ruler [Success Condition] Is Married Spouse Is Ruler [Success Effect] Gain 20.00 Prestige [Requirement] 
Over 16 years old Not a prisoner Not married Can marry Not celibate Not Incapable Not a female over 45 Father has a title higher than count
Ambitions - Crusader Kings II Wiki
Requirement