Allison

“Cassian pulled back, and remained that way long enough that she opened her eyes again to find his face inches from her own. "You're not going to marry Eris," he said roughly.
"No," she breathed.
His eyes blazed. "There will be no one else. For either of us."
"Yes," she whispered.
"Ever," he promised.
Nesta laid a hand on his muscled chest, letting the thunderous beating of the heart beneath echo into her palm. Let it travel down her arm, into her own chest, her own heart. "Ever," she swore.”
― Sarah J. Maas, A ​Court of Silver Flames