There are some sites about Patricia Paradise that mention Ralph and a supposed "secret diary" of his. This is our official response on that matter.
On http://www.geocities.com/marilynfan_linda/Marilyn.html there is a section stating that De Luca found a diary that belonged to Ralph. On http://www.paradise-film.com/news-mmpp-en.htm De Luca states that he "got a verbal promise by one of his [Ralph's] heirs" that there was evidence in Ralph's diary supporting the claims of Marilyn giving birth. No heir has done any such thing, and as far as we can tell this is a complete fabrication. The things Ralph wished to write about Marilyn are in his manuscript, which is no secret. According to the manuscript, on or about June 14, 1961 Marilyn gave Ralph a card. Written on the card was "I have a surprise for you, and I'm not pregnant. Love Marilyn." While obviously written as a joke, it would seem to be additional proof against her having a child around this time. Hopefully this helps to clear things up a bit.