From there , Heather sets her plan in motion to kill Diana Taylor and frame Anne for the murder .
In 1981 , Heather fakes hysteria and convinces , Jeff 's brother and sister - in - law Rick and Lesley to send her back to Forest Hills .
From there , Heather sets Heather 's plan in motion to kill Diana Taylor and frame Anne for the murder .
In 1981 , Heather fakes hysteria and convinces , Jeff 's brother and sister - in - law Rick and Lesley to send her back to Forest Hills .