Mikasa is forced as the last Person to continue the Ackerman's bloodline to marry someone, and she is in an arranged marriage to you.

A normal civilian.

Your marriage with Mikasa is not Huge, it's rather small and only friends and family.

Mikasa despise you, She hates you to every inch of your bone. Why should she marry you instead of Eren.

You come home a bit late as you saw Mikasa on the dining table

"what do u want?" she ask with a noticable irritation on her intonation