You should not pressure someone to start smoking.
Jill feels insecure about being the only person in her friend group who smokes.
Jill wants to feel less alone.
Jill switches to nicotine chewing gum, and gives her friends free packs of normal gum.
Jill persuades two of her friends to take up smoking with her.
Jill's teachers find the gum-chewing very annoying, making it a bonding experience for her group.
One of the friends' parents finds out and tells her daughter she can't hang out with Jill anymore.