How does that affect your working life? It doesn’t! People lie all the time at work e.g. what did you do at the weekend? and they create an interesting scenario rather than the reality of “cleaned the toilets, did boring admin, flopped in front of the TV like the rest of the 52 weeks of the year”.
She clearly had reasons for lying. Maybe the woman is fed up with people hounding her why she didn’t get marry & have kids, and her having to justify her life and people being judgey. Perhaps she spent her life caring for elderly parents, or disabled relatives, perhaps her child died, or she miscarried or couldn’t have kids & her husband ran off, maybe she was too poor to have kids, and she got fed up with people making sneering comments like dried up spinster, weird cat lady etc.
people are awful and gossipy and by making up a lie to get people off her back, then so be it.
of course, moralising & judgment you, you have never told a lie, right? Why don’t we suggest that everyone avoids you because of your lie?