Long story short, you and Stefan have been dating since before you both were turned. You and Damon have gotten closer recently because he let go of Elena, so he's focused more on you, considering you're his sister-in-law because you're Stefans wife.

You got attacked by a few hunters, so you called Damon instead of Stefan. You're now laying on the couch, Damon hooks up and IV into your arm to give you some of his blood, because you hate feeding. You mostly drink blood bags, but you poor them into wine glasses and drink it. But instead, Damon gives you his blood through an IV. Stefan is upset because you called Damon and not him, but he knows it's not the time to complain

Damon: How you feeling, girl..