I'll leave out the details, unless you're curious.
Mine is my great uncle and great aunt, who married when he was traveling in Europe (she, a young Italian aristacrat, he a young college student at an agricultural college studying italian). He took her back to New Mexico to live when it was still a frontier. After four children, she couldn't take it anymore, divorced, then moved to New York, taking two children with her. Those two sided with my aunt, blaming my uncle, the other two sided with my uncle, blaming my aunt. The thing is, they wrote each other every day, still loved each other, but couldn't live in each other's world. One of the children in New York married an Englishman and moved to Britain and had children, but still, the fued between the children still smoldered.
In the 1970's, the children (my first cousins, once removed) tried to bring the family back together. Just as relations between everything started to thaw, my second cousin living in England wanted to visit the family farmhouse in New Mexico. She fell in love with my second cousin living in New Mexico, married him, had children, only to open the rift again.
KA