The Italian's Pregnant Prisoner by Maisey Yates

Pregnant...and at his mercy! Charlotte Adair spent her life locked away in a tower. Her father’s death frees her to find the one man she’s ever loved...only to discover billionaire Rafe Costa is now blind, believes she betrayed him, and is bent on a vengeful seduction! Rafe is shocked to realise that Charlotte is a virgin, but weeks after their scorching encounter, he learns she’s pregnant – with twins! To claim his heirs, Rafe steals Charlotte away to his castle, but she is a far from biddable prisoner. She is irresistible, defiant, and Rafe must seduce her into compliance! Book 3 in the Once Upon A Seduction... trilogy