Ann has had a long business relationship with Aaron Goldie. During a one time relationship, she became pregnant with Aaron's son, Chris. Chris was raised within the trading company without knowledge of Ann being his mother or his father's identity.
Due to Ritsuka Fujimaru's consciousness being sent into that of Juliet Violet's friend, Ritsuka is unable to comprehend all of the sensory data in regards to humans through that connection. Ritsuka views them as Servants contracted to them, Ann appearing as Jaguar Man. The assigned Servants may have some connection in terms of personality, but it is possible for key traits of the person to be confused due to the process.