The Cost of Silence by L. Knight

When journalist Isabella Romano exposes New York’s most enigmatic billionaire family, she thinks she’s telling the truth.
Nico Mancini knows she’s lit a fuse.
Someone wants her quiet. Someone willing to kill for it.
Saving her was never part of his plan, but now she’s in his home, under his protection, and in the crosshairs of enemies older and darker than she can imagine.
He’s determined to keep her alive.
She’s determined not to lose herself to the man she swore to expose.
But the truth has a price…
And falling for each other might be the highest cost of all.