The Love Hypothesis by Ali Hazelwood

Yes.
“Fuck,” someone said. It wasn’t Olive, so it must have
been Adam. “Fuck.” It felt incredible. Otherworldly. His
tongue, dipping in and out, circling and lapping, and his nose
against her skin, and the quiet sounds he made from deep in
his chest whenever she contracted, and Olive was going to—
she . . .
She wasn’t sure she was going to come. Not with another
person in the room touching her. “This might take a while,”
she said apologetically, hating how thin her voice sounded.
“Fuck, yes.” His tongue swiped the entirety of her, a long,
broad stroke. “Please.” She didn’t think she’d ever heard him
quite this enthusiastic about anything, not even grant writing
or computational biology. It kicked the whole thing a few
notches higher for her, and it got worse when she noticed his
arm. The one that wasn’t cupping the cheek of her ass and
holding her open.
He hadn’t taken himself out of his pants yet, that Olive
could see, and wasn’t that unfair, since she was all splayed
open for him. But the way his arm was shifting, how his hand
was moving up and down slowly, that was just unbearable.
She arched further, her spine shaping a perfect curve as the
back of her head hit the pillow.
“Olive.” He leaned back a few centimeters and kissed the
inside of her shaking thigh. Took a deep breath with his nose,
as if to hold the smell of her within himself. “You can’t come
yet.” His lips brushed against her folds as his tongue dipped in
again, and she squeezed her eyes shut. There was a liquid,
burning heat blossoming in her tummy, spilling all over her.
Her fingers clawed at the sheets, grasping for an anchor. This
was impossible. Unmanageable.
“Adam.”