Billionaire's Fake Engagement

My family will NOT take no for an answer, so I’m faking it with my best friend’s sister. I’m set to inherit our large empire, but not without an engagement. The annual family retreat is coming up in ten days. I need to bring my fake fiancée. I haven’t seen my best friend’s sister, Isabelle, since she was a kid. But damn! She is smoking hot! I am totally taken by her when we meet.