Becky Reid, 32, was ordered to serve a minimum of 20 years after being convicted on Thursday by a jury of the murder of her girlfriend, mother-of-one Lyndsey Vaux, 30, following a six-week trial at Manchester Crown Court.
"Ultimately, the main aggressor was her partner, who she had all the trust in the world with", he said.
Following a trial, Reid was also convicted of grievous bodily harm to another previous partner, Samantha Newns.
Ms Vaux had 90 separate injuries when she died - including black eyes, cuts to the lip, a cauliflower ear, bruising to the face and body, and a heavy limp.
Gillian Reid aged 57 of Closebrook Road, Worsley Hall, Wigan was found guilty of section 47 assault, relating to the woman aged 37.
She was given a 12-month jail sentence suspended for 12 months.
Haunting CCTV footage shows show the bad state a battered girlfriend was left in after she was starved, beaten and abused by her lesbian lover.
On the day of her death, Ms Vaux was spotted cowering beneath a auto, and told neighbours she "just needed to rest".
In the final months before her death Miss Vaux appeared downtrodden, malnourished, constantly bruised and going downhill rapidly. Becky told paramedics that her partner had "just collapsed".
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Miss Vaux died in Wigan on May 22 last year, half-starved and severely injured following years of beatings by Reid, after falling under her control and losing contact with her daughter five years ago.
Experts concluded that she had died not from one single fatal injury, but from the combined effects of multiple injuries.
Jurors heard on one occasion Reid kicked Miss Vaux hard in the face at their home for putting salad on her burger.
'She would also often be seen walking around the streets in the local area without shoes or appropriate clothing, sometimes in flip flops and T-shirt in pouring rain.
But despite offers of help and police being alerted by anxious friends and locals, Lyndsey would protect her violent girlfriend and falsely claim she had been in accident or been attacked by someone else and no action was taken against Reid.
She attacked Lyndsey, punching and kicking her as she lay on the pavement, before dragging her into the house.
Senior Investigating Officer Bob Tonge of GMP's Major Incident Support Unit said: 'Lyndsey Vaux was subjected to years of horrific domestic abuse at the hands of her girlfriend, and no decision made here today can bring her back.
'Some neighbours knew about this abuse and did nothing. Had they given us the information that they gave us after Lyndsey's murder then we could have saved her life, and this should act as a stark reminder that we all have a responsibility to stand up to this kind of crime.
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