Teach Me by J. R. Rogue

Despite being the eldest sister, Elizabeth “Sophie” Bordeau’s relationship with rules has always been rocky, at best.
At seventeen, she lost her parents and inherited a life of responsibility she wasn’t ready for.
At twenty, she ran away from it all.
Now, at twenty-eight, she’s back to try to mend old wounds.
But when an unexpected connection from her past walks into her classroom, she has to decide whether she’s finished with her rule-breaking ways once and for all, or if Sloane Callahan is worth one last walk on the reckless side.