The Door at the End of the Stars by K.J. Sutton

Verónica Torres has heard about Hosting along with the rest of the world. In the city of L.A., you can rent your body out for a steep price. During the guest’s “stay”, Hosts will be blissfully unaware of whatever transpires during that time, and strict rules are in place to protect their body’s well-being.
Or that’s how it was supposed to be.
When Verónica becomes a Host, something goes wrong. Although she has no control over what she says and does, she’s still aware of every moment that passes while someone else is wearing her body. She watches herself fall for a man that is unavailable in every sense of the word. She experiences every hushed conversation, every forbidden glance… and every intoxicating touch.
But soon it becomes apparent that Verónica can’t let the affair continue. There’s more at stake than shattered hearts and broken families. Does she have the strength to say goodbye forever? Or will the lies and the love prove stronger than her sense of survival?

TRIGGER WARNING: This novel contains scenes or themes of suicide and cheating.