Ahhh, the Power of Secrets... you love wordplaying don't you?
As Nathan made to greet the newcomer he noticed her lack of control. She was clearly struggling internally and it seemed like the demon had the upper hand most of the time. Well no need to greet that fowl creature. No knowledge on her desires could help him make her sign the contract. The demon wouldn't allow it. Maybe when she had a little more control...

"Going for the steal without an order? You're shaping in nicely human."
Well it said that their souls were worth 10 normal ones to the demon, all to help himself in the end. As they took their seats Nathan went ahead and sat himself close to Amber. He had to alternate in gaining these women's trust. He couldn't just waste time on one while ignoring the other.

Nathan started trying what seemed to be the most expensive food on the table all the while pouring himself a glass of wine and making an offer to fill Olivia's glass.
He noticed Amber glaring intently at a muffin but reluctant in eating it. Nathan took a muffin from the plate and took a bite. "Well made. Compliments to the chef for this exquisite assortment of dishes."- he said while addressing their host.
Turning to Amber he added:"It's very good. Have a try."
With that he hoped to relinquish the fear of poison that he thought was fueling Amber's reluctancy in eating.