The incident happened after an argument over the type of planters they had just bought for the garden of their home at Hollandbush at Closeburn.
And solicitor Liz Dougan told the court at Dumfries on Wednesday that the “niggling” argument continued as Edwina Dawson-Barney, 63, had been preparing a meal.
She had gone out holding a steak knife to ask her husband what sort of meat he wanted with a salad when something was said that made her lose her temper.
She had pushed out her arm and the steak knife struck her husband on the back.
The solicitor added: “She got a towel and held it on the wound and tried to telephone an ambulance but dialled the wrong number and her husband took the phone from her and made the call.”
In the dock, Dawson-Barney admitted striking her husband Ronald, 81, with a knife to his severe injury last July.
He was taken to hospital but wasn’t detained.
Fiscal depute Marion Haig described the knife as having a five inch serated blade and said: “The husband had his back to her and felt a sharp pain in the shoulder area – he felt the knife in his back and got hold of it and pulled it out.”
When the ambulance personnel arrived, Dawson-Barney told them: “I’ve done something terrible . . . I’ve stabbed my husband.”
Miss Dougan added that the couple had been together for 17 years and married for 14 and with both retired spent all their time together.
She said: “Both are back together and perfectly happy . . . they just want to get on with their lives together again.”
Sheriff George Jamieson said that this didn’t appear to be a deliberate attempt to stab her husband – she had pushed him while holding a knife in her hand.
He fined her £300 and made her the subject of a community payback order to be under supervision for six months.