In a statement, Grainne's spokesman said her main concern is for her 16-year-old son Conall.
The move is likely to fuel speculation that Grainne is planning a move to the UK, where she has recently taken on a number of presenting roles for GMTV and is regarded as a serious rival to Northern Ireland woman Christine Bleakley for upcoming roles.
The couple said their marriage has ended but they remain “good friends”.
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