It is a very high chance that she simply said "widow". It was considered more respectable and especially after WWI, was unlikely to be questioned - as long as your ex was safely overseas and not likely to turn up to contradict you!
It looks like there was the beginning of seperation in 1911 and divorce from 1915. In 1915 a James Ford, divorcee, married Annie Pollock in Johannesburg (middle name is indexed Baun but I think might be Bann). He has shaved a couple of years off, making himself a round 40. His new wife was just 25.
https://www.familysearch.org/ark:/61903/1:1:QP4R-BM4B?lang=enThey had at least one child born 1919, although for some reason she wasn't baptised until 1934:
https://www.familysearch.org/ark:/61903/1:1:88JM-813Z?lang=enThe second marriage of that daughter:
https://www.familysearch.org/ark:/61903/1:1:D4XP-74ZM?lang=enview=fullText&keywords=Annie%20Bann&lang=en&groupId=