Georgette claimed that Winehouse wanted to have children with her son and said so in a series of love letters that she herself has seen, reported Sun Online.
"In one letter Amy wrote that Blake was definitely getting her pregnant within two months. She talked about conceiving the baby - which they would call Lucky - on Valentine's Day. But there was a dark side. She also called Blake her most precious poisonous possession," Georgette said.
Winehouse first met Blake in 2005 and got married in May 2007. After a very dramatic relationship, they split two years later, but were reportedly still in touch afterwards.
Georgette said that the letters were sent between late 2008 and mid-2010, before Blake went to prison following a conviction for burglary and fake gun possession.
Blake's mother also believes it was drugs that caused problems between Winehouse and her son.
"Blake has a tarnished reputation but he and Amy were in love. They fell in love and drugs got in the way. Even after their divorce Amy told Blake she'd love him forever. They carried on talking to each other until a few months before she died," she added.
Winehouse was found dead at her house in Camden, north London, on July 23.
