Alibi by Sharon Shinn

Teleportation makes everything possible.
It allows Taylor Kendall to live in Chicago, work in Houston, and take a part-time job tutoring the teenaged son of the richest man in America. But the more time she spends in Duncan Phillips’ lavish home, the more uneasy she becomes. She adores Quentin, who is suffering from a fatal degenerative disease. She’s strongly attracted to Bram Cortez, who heads up security for the household. But she’s growing increasingly afraid of Duncan Phillips, who makes it clear he has no interest in his dying son—and far too much interest in Taylor.
When Duncan Phillips turns up dead, Taylor’s on the short list of suspects who could have killed him. Sure, she was in Atlanta on the night of the murder. But Atlanta is only a few minutes away by teleport . . .