William Daniels and Bonnie Bartlett have insisted it would have been "abnormal" if they hadn't had affairs with other people during their 75-year marriage.
The Little House on the Prairie actress revealed three years ago that she and the 99-year-old actor had had an "open marriage" earlier in their union, and while she has now insisted her comments were taken to be "more than it was", the 96-year-old star admitted they had an unspoken agreement about their antics when working away from each other.
