You shouldn't make fun of someone's phobia.
Chloe just told her friend Ethan that she is terrified of spiders, and he thinks it's funny because he actually has a tarantula.
Ethan wants Chloe to see his pet.
Ethan tells Chloe that there is nothing to fear and offers for her to meet his tarantula, which she accepts.
Ethan sneaks his tarantula over and places it under Chloe's blanket, and when she finds it she's horrified.
After Chloe sees that Ethan's tarantula is nice, she isn't as scared as she used to be.
Chloe no longer trusts Ethan, and tells him never to come back.