Way to Go Rachel
To make matters worse- by viewing the tape, Rachel causes a horse to commit suicide on a boat. God! And possibly even worse than that- Rachel is stupid enough to believe that finding Samara's body is enough to put her at ease and stop the curse. Jesus Christ Rachel, even your oddly smart and weird son was wise enough to know that by doing that it will just makes things worse. So once again, Rachel is responsible for the death of a loved one- and then walks away casually before Noah's girlfriend enters the apartment.
Now granted, if she hadn't shown Noah the tape, Rachel may not have survived in the first place...but regardless she is an idiot. She still left the tape hanging around AND she killed a horse, plus she has no last name. 3 Strikes babe.