A woman accused of having her husband kill her ex-partner expressed relief when she learnt a laptop, potentially containing evidence against her, hadn't been seized by police, a court has heard.

Biannca Edmunds, 33, is charged with murder over a fatal fight on March 12, 2016, when Glen Cassidy and Michael Caposiena killed each other at the latter's Westmeadows home.

Biannca Edmunds (left) has been charged with murder, with prosecutors alleging she directed, encouraged or assisted her husband, Glen Cassidy, (right) to kill her ex-partner.

Police believe Mr Cassidy shot his intended target dead but only after Mr Caposiena inflicted subsequently fatal stab wounds on the other man during a fight. Both died from their injuries.

Ms Edmunds wasn't at the scene, but prosecutors allege she directed, encouraged or helped Mr Cassidy, her husband of two weeks, kill Mr Caposiena, her ex-partner. Mr Caposiena had travelled to Shepparton the day before to visit the son he had with Ms Edmunds.