True Heart by Delilah Devlin

Two men plus one woman equals three bodies on fire…

True Wyatt’s hands are going to be full enough keeping the herd alive through the dead of winter. The last thing he needs to hear is that his brother Lonny rented out their isolated hunting cabin to a reclusive writer–especially a sassy, disaster-prone brunette. Who has the time to babysit a city girl until Spring?
With a deadline looming, erotica writer Honey Cahill is looking forward to six distraction-free weeks to finish her next book. However, between Lonny’s flirty sensuality and True’s hard-edged intensity, the Wyatt brothers set the stage of her imagination for a winter of wicked delights.
However, the fire that destroys the cabin is as real as it gets. Forced to shelter under True and Lonny’s roof, the temptation to experiment–all in the name of research, of course–is overpowering.