Nthabiseng Bedford, 42, was twice the limit when her car collided with another vehicle near the junction of Lynn Road and Clarkson Avenue in Wisbech.
Peterborough Magistrates’ Court heard on Monday that the driver of the other car had not been traced since but the events were witnessed by a dog walker.
Police were called to the scene after alcohol could be smelt on Bedford.
When officers asked if she’d had a drink, Bedford replied: “Yes, I’ve had a gin.”
Following her arrest, she blew 76 microgrammes of alcohol in 100 millilitres of breath. The legal limit is 35.
Bedford, of Church Drove, Outwell, pleaded guilty to drink-driving in Tavistock Road on June 1, 2021.
Solicitor Rebecca Keogh said the incident happened shortly after 9pm after her client’s husband had said he didn’t want to run an errand.
“She’d had a couple of drinks earlier and didn’t think she would be over the limit. She hit a car that she didn’t see approaching from the left on Clarkson Avenue,” added Miss Keogh, who said the other driver had made no contact with her client or insurance firm since the collision.
Bedford’s ban can be reduced with completion of a drink-driver rehabilitation course.
She was fined £390 and ordered to pay £85 costs and £39 victim surcharge.