<P> However , the next morning Tree wakes up again on her birthday . Confused and distraught over the fact that killing Tombs did not stop the time loop , Tree returns to her room where Lori offers the cupcake again . Tree realizes that she had died in her sleep and also notes that this was the only time she had ever eaten the cupcake . Tree realizes that Lori is the true killer ; Lori had poisoned the cupcake , but when Tree did not eat it , she utilized her job as a nurse in the hospital to frame Tombs for Tree 's murder . Tree tries to coerce Lori to have a bite and when Lori refuses , Tree decides to take it to the police . Lori attacks Tree , locks the door and confesses that she was jealous of her affair with Dr. Butler . Tree manages to stuff the cupcake into Lori 's mouth before kicking her out of a window , sending her falling to her death . Tree and Carter muse over the day 's events back in the restaurant . He offers her his room for the night , also commenting her situation is a lot like the film Groundhog Day . Tree wakes up the next day believing herself to be in another loop , but it turns out to be a prank by Carter . The two share a kiss . </P>
<P> However , the next morning Tree wakes up again on her birthday . Confused and distraught over the fact that killing Tombs did not stop the time loop , Tree returns to her room where Lori offers the cupcake again . Tree realizes that she had died in her sleep and also notes that this was the only time she had ever eaten the cupcake . Tree realizes that Lori is the true killer ; Lori had poisoned the cupcake , but when Tree did not eat it , she utilized her job as a nurse in the hospital to frame Tombs for Tree 's murder . Tree tries to coerce Lori to have a bite and when Lori refuses , Tree decides to take it to the police . Lori attacks Tree , locks the door and confesses that she was jealous of her affair with Dr. Butler . Tree manages to stuff the cupcake into Lori 's mouth before kicking her out of a window , sending her falling to her death . Tree and Carter muse over the day 's events back in the restaurant . He offers her his room for the night , also commenting her situation is a lot like the film Groundhog Day . Tree wakes up the next day believing herself to be in another loop , but it turns out to be a prank by Carter . The two share a kiss . </P>
who keeps killing tree in happy death day
who keeps killing tree in happy death day
Lori
Lori