"He wants to make sure the pictures are appropriate.
It's the coercion and control that borders on real-world violence." And sometimes, the abuse involves the exchange of racy photos, a practice called sexting.
She has heard of cases where the abusive partner may take the partner's password to check up on him or her routinely.
Other times, the abuser may violate their partner's privacy by breaking into their e-mail or checking their phone.
In some instances, the victims, usually teenage girls, receive as many as 40 texts a day with negative messages from their partner.
"She is required to keep her cell phone on all day, all night and be receptive," Murray explains.
The abusive teens may also monitor their partners' behaviors on social media sites such as Facebook and My Space.