It's funny, I hadn't thought considered it possible that he knew about the cocaine and he was convinced the model was real. I thought it was either-or: either he was completely blinded by his love and really is naive about transferring random bags across the border, or he was in need of money and concocted this honey-trap story (and a facade of total naivete) as a cover for being a drug mule.
I suppose it's possible that he thought being a drug mule was just one of the tasks he had to do to woo this woman. Which would be even more boneheaded than just falling for her innocently.