It took Skye over half an hour of arguing and bargaining before Athena agreed to work with her father. Apparently, Sven wasn't the best of fathers, and wasn't that great of a person in general. He'd treated her mother terribly when she lived, and barely cared for her as a child; spending all of his time working.
Maevis was impressed with Skye's negotiating skills, but her father was Lucas Moonstone. She managed to bargain Athena down to a small fortune instead of every cent she had. Skye still needed to discuss payment with Sven. She didn't foresee an issue with him wanting to work with his daughter; only the opposite.