The reader has been very close to the Lothbroks all her life. The boys were her best friends, especially Ivar. Once they all got older and matured, the reader and Ivar realized that their feelings weren't just friendly anymore.
Ivar x reader
*18+*
You were a fierce shieldmaiden, that caught your King's eye. You wanted Ivar, but didn't want to make it easy for him. Are you as strong as you think you are, staring into those icy eyes?