Her Roommate Watched Her Sleep

This happened to my SO’s sister: Freshman year, her random roommate frequently complained to her friends about white people, and how much she hated having a white roommate. Sophomore year of college, she moves into a two-bedroom apartment with an acquaintance. She woke up several nights to find the girl in her room, watching her sleep. She didn’t have a lock on her door. Not sure if she confronted the girl or just moved out.