Sabrina had the same thoughts as Marcus.
Marcus cared about Gloria just as much as Sabrina did. When Sabrina left her office in her car, Marcus was having a meeting at the office. He then rushed through the meeting as he wanted to make a trip to his aunt's house. As soon as he left the office, Marcus received a call from his grandfather.
On the other end of the call, his grandfather told him with a breathy voice, "Marcus, I miss your Aunt Gloria. Can you drive me to secretly take a look at her