You agree to invite the Dagovidians into Luathbas. After all, the more subjects, the better.
850 AD, Winter
After the rather unremarkable harvest and autumn pass, the Dagovidians finally arrive in Luathbas, and they are allowed to settle in the eastern region, which has many small rivers and forests, and thus should be perfect look-like for Dagovidian homeland.
Few days later, their chieftain, a tall man with blonde beard tied in twin tails, arrives with a blond girl in thick fur cloak. The man himself wears a cloak adorned with a two skulls as shoulderpads and a winged chain coif as his helmet.
"I am Agva, son of Dag, son of Ragmac. I am chieftain of the people of Dagovida, and I came to express my gratitude for letting us settle in your land, which is bountiful and fertile. I wish to give my most valuable possession, my daughter Igven, as your wife! She is thirteen and already can bear you many children!"
You explain that you're already married and the laws of your Kingdom do not allow for multiple wives at once.
"Then let her marry your eldest son! Please do not reject her, as I will feel that I made mistake by having her with my wife."
A) Politely decline the proposal, hoping that Agva won't feel offended that much.
B) Accept, this will reduce the amount of hassle when Arran legally becomes a man.
C) Excuse the chieftain and ask your wife about that sudden coughing fit of hers.