"Maureen McCormick's sensational claim that she had a lesbian fling with Eve Plumb during their years as sisters Marcia and Jan Brady on "The Brady Bunch" couldn't have come at a better time for blond porn cutie Hillary Scott," asserts Page Six today in a press release-scented plug for that porn star's latest project. Fine! Except? "The book's publisher, HarperCollins imprint William Morrow, denies that McCormick will reveal an affair with Plumb," CBS reported last Tuesday. Gawk at that baloney.