Mother-of-three Bernadette Green, 59, has been jailed for fraud after raking in tens of thousands of pounds in state handouts.
When she divorced from husband Albert in 1999 she began legally claiming for housing and council tax benefits, plus income and employment support, Liverpool Crown Court heard.
But when they reconciled in 2007 – and he moved back into her home in Kirkby, Merseyside – she carried on claiming as though still a single mum.
Investigators for the Department for Work and Pensions first logged that his car was parked on her drive 96 out of the 123 occasions they spied on her.
She was finally caught when they searched her home and found his clean Stagecoach bus driver uniform ironed in her wardrobe, ready for use the next day.
Now the grandmother-of-six has been jailed for 15 months after illegally claiming £95,668 from the taxpayer between 2007 and 2014.
Judge Abigail Hudson said she was sympathetic to the fact Green now has health problems.
But the judge said she had no choice but to order she be immediately locked up for her fraud.
Prosecutor Kevin Slack said Green’s original benefits claims were made on the basis she was single and had no other means of financial support.
She had split from bus driver Albert in 1990 and the pair were legally divorced nine years later.
But the court heard that in 2007 Albert moved back in.
The DWP began surveillance when the pair made passport applications from the same address.
Charlotte Pringle, defending, said Green did not enjoy a lavish lifestyle and was extremely remorseful.
A DWP spokesman said: “People pretending to live alone to get benefits is one of the most common types of fraud.
“This shows our investigators are bringing criminals to justice.”