Based on this prompt from and Anon on Tumblr: "Some kind of like, blood sharing between Stefan and Caroline."
Her blood is sweet.
Stefan's tasted a lot of it since 1864, but nothing like this. He thinks that somehow he should have expected it of her.
It reminds him of something, though he can't quite figure out what. It reminds him of that first strawberry he had right after he turned, familiar yet somehow totally new because his heightened senses made it more nuanced. Or freshly bloomed flowers, their fragrance wafting thick and heavy on the warm spring air. Or like the port wine his father let him try as a boy, rich and full and exotic in a way that suddenly made him yearn for adulthood.
Yearning. That's what it is. More concept than taste, but true nonetheless. It's a feeling he became very familiar with during his time on the Other Side. When Stefan found himself suddenly transported to Bonnie after his death, it wasn't Damon that came to his mind, or even Elena, but Caroline. And not just because he was worried Julian might hurt her in his absence, but that he would now be absent from her life.
He sought her out immediately, because he needed to be near her even if she wouldn't know it, and the impotence he'd felt watching her grief over his death had been maddening. Unable to speak to her, unable to hold her as she cried, he longed to give her some sign. He wasn't afforded the opportunity until after she'd taken his body to the Salvatore boarding house, after Damon and Elena had run off to find a way to save him.
Caroline had continued to sit there, looking more broken than he'd ever seen as she held his hand and cried quietly. He searched the room for some way to tell her he was there until his eyes landed on the nearby drink cart. He picked up an empty tumbler and her favorite bottle of bourbon and poured a glass, setting it down on the nearby table. She stared at it disbelievingly as he did, eyes widening.
"Stefan?" she said hopefully and glanced around the room wildly. He edged the glass closer to her slightly and she laughed through her tears. "I'm so sorry I couldn't stop Julian," she said and hung her head in shame.
"It's not–" he started and then remembered she couldn't hear him. Instead, he reached out and grabbed her hand, intertwining their fingers. She looked surprised a moment and then squeezed his hand.
"We're going to find a way to bring you back," she said, in that determined way he knew from experience was as good as a guarantee. He'd known then that he wanted more with her and he spent the rest of his time on the Other Side, thinking of what he would do and say when he was alive again.
Yet Stefan doesn't do or say any of it when he's first revived. He's too overwhelmed by how good it feels to touch and taste her after thinking he'd never get that chance. He lifts his hand and tightens it around her wrist, the only sign of affection he can manage in his weakened state.
"You're OK," Caroline says through tears, "I'm here."
So, he drinks her in, restoring himself through her. And she lets him.