The answer is:
Portia says that if Brutus were simply sick, he would do something to get better. As his wife and other half, she pleads with him to tell her what is on his mind. Then she inquires about the men who were sneaking around their house.
In Shakespeare's "Julius Caesar," Brutus' wife, Portia, seeks to know what is going through his mind. She even kneels down to ask him the reason he seems so unwell and his mind is so troubled, as promises to keep his secret. She is also worried about the men that have come to see him during the night, who are actually Caesar's conspirators.