After getting Seraphina's wound treated by the doctor and purchasing the medicine that he had prescribed, Elijah carried her all the way back to his car instead of using a wheelchair. In his concern, he did not notice or even think about the fact that after such an important press conference, there could still be reporters following him and his family around to make sure that there isn't any hidden detail left in this scandalous mess.
But Seraphina was aware, and she also noticed that a not so random white car had been following their trail. She noticed the car when they were driving out of her mansion. She had her doubts about the two men in that car being reporters and that doubt turned into confirmation when she spotted one of those two men, holding a camera and capturing a picture of Elijah carrying her inside the hospital.