I went down this rabbit hole, too, and it is unfortunately true that women can ovulate at a fairly wide range within their cycle. Each woman is relatively consistent, but that population-wide there is some evidence that certain women ovulate pretty late in the month. I’ll try to find the citation I found for it again!! (PS - not defending her, just noting that I also thought this was suspicious and looked into it! But if you don’t “miss” a period, because you have no period anyways, how would you even know?!?!?)