The Love Hypothesis by Ali Hazelwood

“I will, then.”
She leaned forward. “Will you ask a long-winded, leading
question that will cause me to ramble incoherently and lose the
respect of my peers, thus forever undermining my place in the
field of biology?”
“Possibly.” He was smiling. “Should I buy you that
disgusting”—Adam gestured toward the register—“pumpkin
sludge now?”
She grinned. “Oh, yes. I mean, if you want to.”
“I’d rather buy you anything else.”
“Too bad.” Olive jumped to her feet and headed for the
counter, tugging at his sleeve and forcing him to stand with
her. Adam followed meekly, mumbling something about black
coffee that Olive chose to ignore.
Enough, she repeated to herself. What you have now, it will
have to be enough.