When Emily finished eating lunch, there was still an hour break, so she excused herself to use the restroom; Samuel, on the other hand, went to socialise with other members. Although he wanted to spend time with Emily and introduce her to important figures, he could not follow her to the bathroom.
He did not mind everyone in the conference believing that he was dating Emily, but he had to respect her; people would get all the wrong ideas if he followed her to the toilet.
While Samuel did not follow her, Eric immediately abandoned his food and followed Emily. A few people were around, so she did not notice she was being followed.
When she got to the restroom area, she noticed that the cleaner had just come out, so the place was quiet because of the signal that was put on.
