Colton's of Mustang Valley Series by Marie Ferrarella

Deadly enemies undermine her life and business When a mysterious email threatens her family’s corporation, executive Marlowe Colton puts all her energy into protecting Colton Oil. But a more shocking scandal comes in the form of her archrival—and one-night lover—Bowie Robertson, who uncovers the consequence of their passion. As danger encroaches, Bowie and Marlowe must put aside any bitterness to safeguard the family neither ever expected.