Don't know where FreeOnes gets that birth date from, but it must be wrong.
Her PureStorm page (http://www.purestorm.com/profile.aspx?id=stacey2lacey) says that she's 23. It also says that she joined the site on 13 January 2009, so she must have been at least 18 by then, not 15 as the FreeOnes...