His pet spiders

Aaron was my brother’s friend, and he had a pet cat named Cleo.
Aaron came over a lot, and his cat would follow him,
My dog barked at the cat through the window or the fence.
Aaron’s house had thick shrubbery with spiders in it.
He called them his pets.
One day, Aaron came over, but Cleo didn’t.
Cleo had died from a spider bite.
His parents tore out the shrubbery. No more spiders.
Except for one that Aaron kept in a jar.
He said some night he’d release it in my room.
I kept my window closed. And locked.