Pinky Promises by Stefanie Jenkins

One night. One pinky promise to remember.
Brynn Macallister and Callum “Cal” Murphy have been best friends since before they could walk. His calming touch brings her peace in the stifling society life they’ve grown up in and grounds her like nothing else can.
When that touch turns to more than comfort, it ignites a fire within Brynn she never knew existed. Suddenly the lines of friendship look a little blurry—and neither of them are ready to go back.
But when Cal’s father pushes him toward marriage—to someone else—they’re forced to admit there’s more between them than they’re ready to let go of.
As lies and deceit threaten to unravel them, will they have the strength to overcome it, or will their pinky promises be a thing of the past?