The restaurant was just a walking distance from Samantha's shop. Selene asked Samantha to leave the restaurant first as per the instruction of Eros.
She just told Samantha that Eros aka Gabriel would have something to do and he would follow them after. Samantha didn't suspect anything.
Selene didn't want to scare Samanthaby telling her that someone might be following them. She just let Eros handle everything. Though she was still nervous for his safety. She just hoped that nothing bad would happen to him.
Meanwhile, Eros was now tailing the man behind. He just confirmed it. The man in a black leather jacket was following and monitoring Samantha.
Eros sped up to catch up with the guy. Upon reaching the guy, Eros grabbed his shoulder and pushed him on the wall near that sidewalk.