premise: How to defend against a psychological family violence claim<br>Keep records of all communications. Avoid speaking to someone who's accused you of psychological or emotional abuse unless those conversations can be recorded in some way. [substeps] When you do have to interact with them, do it over email or text message whenever possible so you can maintain a record of the conversation.
hypothesis: Someone accuses you of psychological or emotional abuse then you will need some proof. 
reason: to defend against a psychological family violence claim, you need records of all conversations and this records will be proof.