Madison Martin, 26, and Jessica Ann Parker, 20, appeared at the Bendigo Magistrates' Court on Wednesday.

Mr Martin is charged with offences including aggravated burglary, conduct endangering life, prohibited person in possession of a firearm and methamphetamine possession, while Ms Parker is charged with aggravated burglary and conduct endangering life.

Mr Martin did not apply for bail, but Ms Parker did.

Her application was opposed by police, who alleged she could interfere with witnesses.

Detective Senior Constable Matthew Bullock, from the Armed Crime Squad, told the court that the two victims were in the Strathfieldsaye home about 6.30pm on Tuesday when they heard a loud bang and a man yelling, "You owe me money, where's my f***king money?"

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It was alleged the front door was then forced open and Mr Martin entered with a firearm, with Ms Parker following behind.

Mr Martin allegedly demanded money and pointed the firearm at one of the victims.

Ms Parker was accused of saying, "Smack her in the mouth, shoot her foot off" during the encounter.

Detective Senior Constable Bullock said one of the victims had purchased a vehicle from Mr Martin for $1600 and it was agreed payments would be made in installments.

After paying off most of the amount, the court heard, the woman took possession of the car and it was understood $200 was still owing.

It was alleged Mr Martin sent the victim a message about a month ago saying he was going to "shoot the house up".

The court was told the two victims had met with Mr Martin and Ms Parker at the Strathfieldsaye home to discuss the issue, but Mr Martin behaved aggressively towards the woman.

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After Tuesday night's incident, police arrested Mr Martin and Ms Parker at an Eaglehawk address.

The court heard police found a sawn-off double-barrelled shotgun and cartridges in a child's bedroom, methamphetamine in another bedroom, and cannabis.

When police attended the Strathfieldsaye home, the court was told, they found a hole in the front door and pellet damage to the refrigerator consistent with a shotgun blast.

Ms Parker, representing herself in the bail application, said she could live with her parents, but they did not know she was in custody.

When asked to respond to police concerns that she could interfere with the witnesses in the matter, Ms Parker said: "To use a gun over $200, it's unheard of".

Magistrate Patrick Southey refused bail and said Ms Parker had not shown the compelling reasons necessary.

She and Mr Martin will return to court in September.

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