Police discovered a £52,000 drugs factory when a 12-year-old girl reported a burglary at her family's home.
Emma Clague's daughter rang 999 after catching men ransacking their house in Seaforth Road, Seaforth .
Officers arrived just after midnight to find the burglars had already escaped, but recognised a strong smell of cannabis .
They saw cushions had been taken off sofas and when Clague came downstairs with her daughter, the girl was "visibly shaken".
Police also spotted a cannabis grinder and snap bags on a kitchen worktop, so asked Clague if there were any drugs in the house.
Liverpool Crown Court heard she produced a small bag of cannabis and was arrested, leading to police carrying out a full search.
And inside a Pampers nappy box in a kitchen cupboard they found a block of cocaine weighing around 125g.
Kate Morley, prosecuting, said there was also a red tin in the box containing cocaine, heroin and crack cocaine.
Two sets of scales showed traces of cocaine and cannabis, while a mixing bowl and spoon revealed heroin and cocaine.
More police arrived with a sniffer dog and searched a ground floor bathroom with a flat roof, before heading upstairs.
They looked out and saw a red bag on the roof, containing a shopping bag with a 300g block of cocaine inside.
In total they recovered 446g of cocaine, 81g of heroin and around 2g of crack cocaine, with a street value up to £52,000.
Clague denied knowing the drugs were in the house on July 3, 2016 and claimed she had no idea who they belonged to.
She was set to stand trial, but on the opening day admitted three counts of possessing Class A drugs with intent to supply.
This was on the basis that she allowed her house to be used for the mixing and weighing of drugs for onward supply.
Clague, who has a previous conviction for shoplifting nearly 25 years ago, had previously admitted possession of cannabis.
Matthew O'Neill, defending, said jailing Clague, now of Maple Close, Seaforth, could have a "detrimental effect" on others.
He said she was a woman of good character - bar the shoplifting - and argued there was a realistic prospect of rehabilitation.
Mr O'Neill said Clague had "strong personal mitigation" and in the three years since had stayed away from crime and worked in a charity shop.
He said: "She has two young children. Frankly if the mother is sent straight to prison today, they could well be affected by that."
Judge Stuart Driver, QC, said the quantity of Class A drugs was high, with sentencing guidelines indicating up to four years in jail.
However, he likened the case to the offence of permitting premises to be used for supplying drugs, which has a lower sentencing range.
Judge Driver accepted that jailing Clague would have a "harmful effect on others" including her youngest daughter, now 15.
He handed the mum 21 months in prison, suspended for two years, with a 25-day Rehabilitation Activity Requirement.
Clague cried and members of her family sobbed in the public gallery, as Judge Driver added he was reserving any breaches to himself.
He told the tearful mum: "If I see you again, you are going to prison for 21 months, without any excuses saving you."
