A 51-year-old Northern Tasmanian man who cannot be named for legal reasons, has pleaded not guilty to three counts of rape and one count of perverting the course of justice.

On Monday a Launceston Supreme Court jury was told the woman would regularly visit her neighbours and play with the couple's children.

The court heard the woman was invited to spend a weekend at the family's new house, visiting sometime between January and March in 1995.

While giving evidence, the woman told the jury on the Friday night she went with the man to go shooting for dog food about 10pm.

They'd been in the bush for a few hours when the accused climbed into the backseat of the car and told the woman to get in, the jury was told.

The woman told the court she didn't want to so she declined the man's request.

The man allegedly got out of the car, walked to the passenger door and told the woman they weren't going back to the house until she laid on the ground.

During cross examination, defence lawyer Greg Richardson asked the woman why she laid on the ground as a result of being told to do so if she didn't climb into the backseat when told to.

The woman said: "I don't know".

The court heard the second alleged rape happened when the man's heavily pregnant wife had gone out, with the woman saying the man pushed her into the bedroom, pulled her trousers down and raped her.

At some stage on the same day the woman was sitting on the couch when the man pushed her, held her hands behind her head, and forced oral sex, the jury was told.

Mr Richardson suggested to the woman that she followed the man into the master bedroom on the Friday night, they kissed and had consensual sex, but the woman said no.

The trial before Justice Michael Brett continues.