Kallista Mutten is testifying in the NSW Supreme Court trial of her former partner, Justin Stein.

Justin Stein is accused of killing Kallista Mutten's daughter, Charlise.

Stein maintains his innocence, claiming that Mutten shot Charlise.

The trial has revealed conversations about Charlise's custody during her visit with Mutten and Stein.

Mutten last saw Charlise on January 11 before reporting her missing on January 14.

Stein allegedly admitted to hurting someone he believed had Charlise.

The prosecution argues that Stein killed Charlise while Mutten was away.

The trial, presided over by Justice Helen Wilson, continues with Mutten facing cross-examination by Stein's lawyer.