I seldom visit GenForum using the Rootsweb Message Boards most often so just found your query.
I checked my master SHOCKEY database, "The Shockey Chronicles" and "Shockey History and Genealogy" but none have a listing for any children from the marriage of Samuel Christian Shockey to Sarah A Penn.This does not mean that there was not a daughter or even more than one child from this marriage.
Most of the information in the books "Shockey History and Genealogy" was the result of research by Ralph N and Marie F Shockey or for family information submitted to them for inclusion in the books.Besides this information Donald Shockey spent several years researching, especially lines that he was interested in and he did find three children by Samuel Christian's first marriage.
A couple of us have been spending our free time since 1993 trying to get all the data from the two sets of books entered into a database, correct the many errors and keep adding data from the various new found cousins which usually amounts to several hundred new names being added each year.
I will continue to watch this line for you and let you know if I receive anything new.Each time a new name appears it provides another clue to aide searching various databases.