Occasionally someone asks about this. Here is the best example I have ever encountered. Google on "Alice Keppel". This woman was superb and her husband the lifelong devoted cuck, in an age when such a thing was frowned upon.
"On June 1, 1891, she married the Hon. George Keppel, a son of William Coutts Keppel, 7th Earl of Albemarle. She was 22 when she married, he was 26. Within months of marrying, she is said to have taken a wealthy lover. Her first daughter was born in 1894, and the father was rumoured to be Ernest William Beckett, the future Lord Grimthorpe."
And so much more.
"On June 1, 1891, she married the Hon. George Keppel, a son of William Coutts Keppel, 7th Earl of Albemarle. She was 22 when she married, he was 26. Within months of marrying, she is said to have taken a wealthy lover. Her first daughter was born in 1894, and the father was rumoured to be Ernest William Beckett, the future Lord Grimthorpe."
And so much more.