My great-grandfather was widowed and remarried in late 1940ies to a woman who was his university-age daughter's friend (that daughter was my grandmother). Yeah,

My great-grandfather was widowed and remarried in late 1940ies to a woman who was his university-age daughter's friend (that daughter was my grandmother). Yeah, he was considerably older (late 40ies/early 50ies?) than her (like 23?). That lady is my great-grandmother (sure, she's not blood related to me but they had children and they are all my various uncles/aunts and cousins). When I brought in my children to see the family, they got to meet their both of their great-grandmothers, great-grandfather, and on top of that their great-great-grandmother. Now THAT's rare.