Derek McSkimming, 48, and his wife Anne, 47, were heading to their home at Glenlee, near New Galloway, when the accident happened last year.
Witnesses heard a bang and then saw the motor cycle in the roadway at a road junction on the A713 road near Castle Douglas.
In court at Dumfries earlier this week, lorry driver Michael Mitchell, 33, admitted a charge of driving carelessly and causing the death of the couple in June 2014.
The court heard that he failed to observe the Suzuki motor cycle approaching as he was turning right a road junction leading to the A75 road and drove into the opposing carriageway and across its path.
Paramedics were quickly on the scene but were unable to save the couple.
The road was closed for several hours after the accident.
Derek, who worked at the Glenlee Power Station, and Anne, who was a cook at Kells Primary school, were well-known and respected locally.
Sheriff Brian Mahon deferred sentence for three weeks and Mitchell, of Carlyle Place, Dumfries, was banned from driving in the interim period.