Disclaimer: nothing is mine.

Setting: Season 6, after "The Gift". No real spoilers.

Every night she comes to him. The sun barely sinks down the spires, and unnoticed she gets out of her room to follow her way to his crypt. She takes a waste bottle away from his hands and lies alongside.
First time it was unbearably painful.
First time she sobbed, violently holding his hand, tightened around the stake inches away from his chest.
First time she bit her lips till they bled, trying not to cry, when he entered her, stretching, tearing. When his lips groaned out a stranger's name.
First time she, gulping back her tears, washed away her own blood from his sleeping form. And the next morning – his scent from her body.
So as to come again.
In the daytime she spends hours with him. They joke and play cards. He tilts his head and calls her Lil'Bit.
He remembers nothing. Alcohol completely wipes all the nightly events off his memory.
But she doesn't forget.
Every night she sleeps with him, arching under his body weight. When he moves in her, deeper with every thrust.
Every night she rocks to meet him, with her legs enfolding his firm thighs, and whispers feverishly, "Spikespikespike…"

Every morning he sleeps soundly and she frees herself from his cuddle to get furtively back, to her house. And wash his taste, his scent away from herself over again.

In the daytime he tells her that every night he dreams about her sister.
And she knows it's the only way to keep him from the fatal step. The only way not to let him die.
Hence every night she comes to him over and over…