Pregnant Leanne Whelan, 32, swung a hammer at Peter Taylor before branding him a “q****” and “a f*****” along with sisters Louise, 29, and Samantha Whelan, 33, in Liverpool last year.
Children witnessed them shouting and screaming at the victim, reports Liverpool Echo.
But a judge ruled jailing the callous trio would cause “significant harm” to their children.
Mr Taylor had intervened during a dispute between the sisters and the paternal gran of Samantha’s children, Deborah McKenna, over a dog.
He told them to calm down before the tirade.
“Leanne Whelan was seen to be bouncing towards Mr Taylor, threatening and generally acting aggressively. Mr Taylor was shocked and scared”
Mr Taylor said: “Samantha Whelan was abusive and said ‘f*** off, we don’t want you.”
He said she then swung the hammer missing his upper body.
Paul Becker, prosecuting, said: “Leanne Whelan was seen to be bouncing towards Mr Taylor, threatening and generally acting aggressively. Mr Taylor was shocked and scared.”
Mr Taylor backed off but the sisters were “all shouting homophobic comments about Mr Taylor”, Mr Becker added.
He was left feeling anxious and depressed, “looking over his shoulder all the time” and struggling to sleep at night, the court heard.
The Whlean sisters previously accused the victims of lying, before admitting threatening behaviour.
Leanne, who has five previous convictions for 10 offences, also admitted possessing an offensive weapon.
Bernice Campbell, defending Samantha, said she had a daughter, 14, and son, aged four, who was awaiting an assessment for autism.
She said: “Samantha Whelan has been a victim herself, calling the police after she got beat up in front of her four-year-old child.”
The judge handed Leanne nine months in jail, and Louise and Samantha nine weeks in jail, all suspended for 15 months.