Flaming is the process of one person sending messages that are intended to hurt the person emotions.This can be with pictures like sexting or just hurtful words.
Sexting is the process of someone sending explicit photos to someone. This can lead to the photos to be leaked to other people resulting in bullying like in the below example.
https://i.ytimg.com/vi/qM5YXheHYrI/hqdefault.jpg
Real world
Amanda Todd was a girl that caved into sending an older boy nude photos of her breast. Once the boy exposed these pictures she was bullied even when she moved schools.This u ultimately led to her committing suicide. https://en.wikipedia.org/wiki/Suicide_of_Amanda_Todd