People's Hospital was only so big. Carolline Ruiz and Avery Graham were bound to run into each other there. After running into Avery, she naturally found out about Brian Hawkins not wanting any caretakers. She went to ask Henry Ruiz.
In the end, Henry did not hide it from her, but instead told her that Bryan was undergoing treatment. Carolline stopped going to the Hawkins family, as her purpose of going there was to get Bryan to agree to undergo further treatment sooner.
Since Bryan was already doing it, his refusal to have a caretaker take care of him was no longer an issue.
In order to avoid suspicions, Carolline didn't bother to inquire about Bryan's matters anymore and focused on her internship instead.