Then, Beth says she found out Lisa bought condoms for Pierce. "I was floored," she says. "So then I thought, 'Maybe Lisa wasn't really being honest with me.'"

Lisa says she understands where Beth is coming from but feels torn. "If she took Courtney to a doctor and got a cervical cancer vaccination, got her a checkup, got her on birth control, I would pat her on the back," Lisa says. "I didn't really feel like I needed to run that particular aspect of the information through her, but I see in hindsight that I was wrong, that I probably should have called her."

Lisa says she is not encouraging Courtney and Pierce to have sex. "I am making sure I am not giving them the opportunity to be alone, so I gave Beth my commitment on that—that there is no den of iniquity happening in our house," Lisa says.