Hi Caroline!
An ancestor of my uncle was in the workhouse on the 1901 census, listed as a widow. On the 1911 census she was living at home and her husband (same name) was with her. Weird! I did a bit more research and found the marriage was not a happy one and when she claimed to be widowed her husband was actually living about 50 miles away with another woman! She had previously claimed that he had deserted her, for which he was brought before the magistrate. I suppose it was simpler to lie to the authorities to get the help she needed. The reconsiliation in 1911 did not work, by the way, he died back at the address he shared with 'wife' number 2.