Greek Tycoon's Baby Bargain by Sharon Kendrick

Alexandros Pavlidis always ended his affairs before he got bored. So he never expected to see his London mistress, Rebecca Gibbs, again — until she showed up with shocking news: she was pregnant with his twins!

Xandros was intrigued when Rebecca didn’t touch a penny of the substantial payoff he gave her. And when the babies were born, everything changed. These were Pavlidis heirs! Now he was on his way to London to bargain for his sons!