Two women trade houses without ever having met .  They 're both looking for an escape from their problems , but by running away , both come to discover a great deal about themselves .  Ria Lynch is married to Danny Lynch and they have a daughter and a son .  Danny begins spending less and less time at home with his wife and children .  Ria believes another baby is the solution , and is shocked to find out that indeed her husband is going to be a father - but to a child from an affair he has been having .  Her husband's unfaithfulness is the event that leads Ria into her decision to switch homes with a woman from the US called Marilyn who lost her teenage son to a motorcycle accident on his birthday .  Marilyn is struggling to come to terms with her son's death and has become estranged from her husband .  She hopes her time in Dublin will cease her grief .  Ria and Marilyn discover deep , dark secrets about the other during the summer .  The two become close friends but do not reveal the secrets .  { { Expand section } } 
Who hopes her time in Dublin will cease her grief?
Maryin's husband