"She" is the subject of "is talking" in the clause "She's talking on the phone."
"...her neighbor" is the subject of "died" in the clause "...how her neighbor died."
"...she" is the subject of "has talked" ('s talked) in the clause "she's talked about the incident so far...."
"...number of times (number)" is the subject of "isn't" in the clause "...the number of times...isn't enough."