'St. Elsewhere' star Bonnie Bartlett Daniels reflects on past open marriage: 'That was very painful'

Bonnie Bartlett Daniels, who has written a memoir titled "Middle of the Rainbow," has starred in hit shows like "St. Elsewhere," "Little House on the Prairie," and "Home Improvement."

"I guess it was a little bit of an open marriage at first, but that was very painful," Bartlett Daniels told Fox News Digital. "That didn’t work well. And it was a time when people were doing that. It was at a time in New York when there was a lot of sex and a lot of people doing all kinds of things, you know – very free. But I don’t know if there was a lack of commitment a little bit, and that’s not good. So there was a lot of pain connected with any transgression, with any extramarital thing." Stephanie Nolasco covers entertainment at Foxnews.com.

"It was very painful for the both of us," the 93-year-old shared. "But it was something we had to go through because we never went through it. When we got together I was 18. Bill was my first boyfriend… We just had to go through all that and still, we loved each other very much and always have. [We] have always been there for each other. That’s what matters - if you’re there for the person and help [them] along in a relationship, [have] respect for them and what they’re doing and being there for them… [You have to] be together on the other side."