A Long Sutton woman joined in a street brawl when a care home deputy manager was on the ground and “began punching her on the floor”.
Jackie Moore waded in but only afterwards discovered the woman she had punched – Cassie McMahon – was a friend of her mother’s, magistrates heard.
Nick Todd, prosecuting, said Moore had three previous convictions for common assault.
The incident happened after Mrs McMahon, her partner and another couple were leaving The Granary at Long Sutton in the early hours of April 27.
A third party became involved in an incident with Mrs McMahon, but then Moore appeared from the pub and began punching Mrs McMahon while she was on the ground.
Mr Todd said Mrs McMahon was injured that night, “but there are no obvious facial injuries which can be laid at Miss Moore’s door”.
In her interview with police, Moore said she came out of the pub – saw that a fight was going on – and went to the assistance of a friend.
Mr Todd said it emerged after the incident that Mrs McMahon and Moore knew each other.
He said: “It would seem Miss Moore and Mrs McMahon had met before in a job interview situation.”
Solicitor Daven Naghen, mitigating, said: “She wades in, she agrees she ends up assaulting Mrs McMahon and she agrees that her behaviour went beyond what was reasonable.
“She is throwing punches and scuffling on the floor as opposed to trying to pull people away.
“At this point drink has been a factor, a lack of consequential thinking has been a factor and a lack of ability to control her anger have all played a part.”
Mr Naghen said Moore accepted with hindsight she could have said “what’s going on here?” and tried to separate people.
He said Moore, a care assistant, regretted the incident.
“Only afterwards in interview she realises this lady (Mrs McMahon) is a friend of her mother’s, which only adds to her regret,” said Mr Naghen.
Moore (23), of Seagate Terrace, Long Sutton, pleaded guilty to assault by beating.
She was given a 12-month community order, with supervision by the probation service, and must do 40 hours’ unpaid work.
Moore was also ordered to pay £50 compensation to Mrs McMahon, £85 costs and a £60 victim surcharge.