Jule Niles, 38, says she has to sneak past staff to sleep at a Big Yellow Storage warehouse just off the M25 in Hertfordshire.
Meanwhile her son lives in a £700,000 apartment with his brother Cordi in Finchley, North London.
“It’s a metal container with no windows or carpet. There is no toilet or washing facilities,” Jule, a childcare worker, told The Sun On Sunday .
“My son Ainsley could buy me a flat with two weeks or two month’s wages.
“My son plays for Arsenal and I am homeless and in a storage unit.”
Maitland-Niles is on a £30,000-a-week contract at Arsenal and has made 21 appearances for the Gunners this season.
Jule was involved a bust-up with Arsenal’s chief negotiator Dick Law at a meeting over Maitland-Niles’ future in March 2015.
She has also been accused of clashing with Ipswich boss Mick McCarthy during the England Under-21 international’s loan spell there.
“There are times when I have sat on my own and cried.” she said.
“It wouldn’t matter if Ainsley lost all the money tomorrow. He and Cordi are my sons and I love them. I just want them to know that.”
A source close to Maitland-Niles told The Sun of Sunday that he was unaware Jule had been living in a storage container, and that he has given her money and continues to do so.
Arsenal and Maitland-Niles declined to comment on the story.