Alan Webster, 40, and his girlfriend Tanya French, 19, both from Hatfield in Hertfordshire, pleaded guilty to rape and making indecent images.
Webster was given a life sentence at St Albans Crown Court; French was jailed for five years.
International law enforcers alerted police after Webster downloaded 7,000 indecent images from the internet.
The baby's mother was unaware of the abuse until detectives visited her home after finding photographs detailing the abuse at Webster's home.
Sentencing Webster, Judge Findlay Baker said the offences were committed against the "most vulnerable victim - a little baby".
"There are no words to express the abhorrence such offending generates," he added.
Sentencing French, he said: "You did not shrink away from the acts in which you joined, but looked forward to them."
But he said French was also a victim and had come under Webster's "malign influence" and was to some extent "corrupted by him".
French admitted four charges of rape, five indecent assaults, two charges of permitting indecent images to be taken of children and two counts of making indecent images of the child in February and March 2004.
Webster admitted one charge of rape, four indecent assaults, two charges of permitting indecent images to be taken of children and two counts of making indecent images of children.
Webster also admitted a separate charge of indecently assaulting a 14-year-old girl and seven offences of possessing child abuse images.
Just following those Muslim values I suppose. I mean Aisha was just 9, so a 14 year old is quite an improvement.