Honey Beezleigh 
No Mortals Allowed 
What If Myth, #1

Ariadne is offered an incredible opportunity by her lover,  Dionysus, the god of wine. He wants her to live with him at the home of the gods, Mount Olympus.

The catch? She must stay under a disguise as an immortal satyr, since Zeus has forbidden mortals from stepping foot there. 

But Ariadne soon discovers that the real danger is to her heart. She may live with Dionysus, but it is not as herself or even his equal. They talk to each other, but not of their true feelings for each other.

And, most damning of all, Ariadne may live with immortals but it does not stop her from aging.