Showing Where There's Smoke by Sandra Brown

No one knows why Lara Mallory opens up her medical practice in the rowdy Texas town where Tackett Oil owns everything. But everyone remembers her role in the well-publicized scandal that caused the downfall of White House hopeful Senator Clark Tackett. Now the ironfisted matriarch of Tackett Oil intends to use her money and power to drive Lara out of town...especially when Lara meets Key, the hell-raising, youngest Tackett son. Before long, this determined woman doctor and brash, daring flyer find themselves hurtling on a soul-searing quest for the one secret that can destroy the Tackett empire, as rumors start flying that...Where There's Smoke.