MDX SubSelect Query

Hi,is there a way in which I can return the children of a dimension if a value is true or if not limit what's returned?

Sample MDX below:

SELECT NON EMPTY [Measures].[Measures] ON COLUMNS,
NON EMPTY [Dimensions].[Dimensions] ON ROWS
FROM
(
    SELECT    
        CASE
        WHEN [Dimensions].[Value].CurrentMember IS [Dimensions].[Value].&[Apple]
        THEN [Calendar].[Fin Month].Children
        ELSE [Calendar].[Fin Year].&[2014]
        END
    ON COLUMNS
    FROM
    [Cube]
)

What I trying to return is all months where the dimension value is Apple but if not then only return me results in the Fin Year.

Many thanks.