We don't know this for sure. Why would Crhristine Jay fly transatlantic on a wild goose chase anyway?
She, 'did what she felt that she had to do', to see the extent 'that the lies about 'the true identity of the biological birth mother', rather than, 'herself', being 'that', despite 'the role she played out' in the 'sex scandal', of her being the 'legal birth mother' (only) to 'Sheila' [when 'it may never have been', or 'never able to be a proven fact' or [that] 'no such thing', 'had', or 'hadn't', been 'true' beyond belief'!!