Time Stops With You by Nia Arthurs

Ronan Cullen is a silver-eyed, terminally ill millionaire who blows into my life with two simple words—‘marry me.’

After years of caring for my genius little brother, the kid finally does it—he hacks into a top-secret coding program and lures a reclusive millionaire straight to my door.
Cullen’s health is failing and he wants to secure a legacy, but one wide-eyed plea isn’t nearly enough to convince me to become the next Mrs. Cullen.
Even if the request comes from a man with hypnotic eyes, endless wealth, and the power to sweep me off my feet.
Falling for a man marked for death means crossing a line I can’t uncross. And with every moment I spend with Cullen, I feel myself slipping deeper, knowing that no matter how tenderly he holds me, no matter how sweetly he kisses me, no matter how much I crave him…

Ronan Cullen is running out of time.