In an exclusive interview, Louise Turpin's sister, Elizabeth Flores, said she hasn't had a close relationship with her sibling for about 20 years, though she attempted to reach out and speak to the children for many years.
VIDEO: Mom of 13 allegedly held captive in Perris home was 'perplexed' by arrival of deputies
Flores said as young parents, the Turpin couple seemed very strict, but Flores did not notice signs of abuse.
Flores said when she was younger and in college, she briefly lived with the couple. As for her brother-in-law, David Turpin, she said he made her uncomfortable at times.
"If I were to get in the shower, he would come in there while I was in there and watch me, and it was like a joke," she said. "He never touched me or anything."
Flores said that at the time, she was very young and treated as if she was a child. She never told anyone about the way David made her feel.
RELATED: Perris neighbors describe past odd behavior, interactions with family
"Now that I'm an adult and I look back, I see things that I didn't see then," she said.
Flores said her parents had tried to fly out to see Louise, David and the children, but the couple turned them away.
"She told him to not come. He got the ticket, he was going to surprise her, and he called her to tell her he was coming and she told him not to come," Flores said.
When asked why they didn't question the family's isolation, Flores said she didn't find anything to be weird because the couple kept to themselves even before the children were born.
VIDEO: Grandparents say 'God called' on Perris couple to have so many children
As for what she would say to her sister now, Flores cried, "I want her to know that she's still my blood, and I love her. I don't agree with what she did, and her actions have made the whole family suffer."
"I want to reach out to the kids. I want them to know that for years, we begged to skype them, begged to see them...and I want them to know that they do have family that (love them), whether they know us or not," Flores said, as she wiped away tears.
She added that the rest of the family wants explanations, just like the rest of the world.
TIPS: Do you know the signs of child abuse and neglect and what to do if you see them?
The Perris couple accused of torturing their children and shackling them in filthy conditions are expected to be in court Wednesday.
David and Louise Turpin each face 19 counts of torture and child endangerment.
Authorities found some of their 13 malnourished children - ranging from 2 to 29-years-old -- chained to furniture inside the home, after one of the teens escaped and called 911 over the weekend.