Between Two Thorns by Aurum Gray

Rose Woods has always felt torn between two worlds.

At home, she’s the dutiful daughter on the family guest ranch, but with a fake ID and the allure of the college bars, she’s a young woman ready to find her own steamy adventures. Her birthday wish was to meet the perfect man—and she did, twice over. Del, Mr. Strong & Silent, and Sam, Mr. Charming & in Charge.
The chemistry between the three was instant, and Rose was right on track to get a kiss or two by midnight—when the plant zombie apocalypse forced her to make a desperate journey back to her family, lovers in tow. Tensions flare as the divide between who she was with her family and who she becomes with her lovers deepens.

In a world where survival is everything, will Rose choose the bonds of blood or the pull of passion?