Gene Simmons' daughter slams Katey Sagal for revealing affair: 'She should probably look at her own family before pointing fingers'

Katey Sagal might be rethinking a few pages of her memoir.

In her new book, the "Married With Children" actress reveals intimate details of a past affair with KISS frontman Gene Simmons. More than 40 years ago, the two engaged in a years-long relationship, even though both were supposedly committed to other people. And Sophie Simmons, Gene's 24-year-old daughter, is not impressed by the revelations.

"She should probably look at her own family -- I'm just saying -- before pointing fingers," Sophie said on Allegedly with Theo Von & Matthew Cole Weiss."I mean, if Katey wants to write a book about her life, cool — but to write about someone and then have it affect their family I feel like is a really kind of low place to go to try and sell a book."

The backstory: Katey and Gene met at a bar back in the 1970s. "I took him home with me that night," Sagal writes in new book "Grace Notes." The affair was on-and-off for years, until Sagal said if he didn't propose, she would marry her then-boyfriend. Gene laughed at the idea, and the two went their separate ways.

For his part, Gene has been with now-wife Shannon Tweed for four decades. In addition to Sophie, they have a son, Nick, 28.

"It really doesn't affect us — we're so tight as a family," Sophie said. "My parents are so crazy in love. I mean, congrats to the one groupie who thought they got ahead, but apparently didn't. ... You're a really talented actress, so it worked out."

See photos of Sophie Simmons: