i had this problem when my son split, and i had two grandsons she treated me so bad,when they were together and i took it for the sake of my son,then when the children were born it got worse,and i couldnt take anymore of the emotional blackmail,i have let go and know my grandsons love me will understand,unfortuneatly my son is draging his new partner,across the country to see his children and the mother is rubbing her hands,i am worried that my son is going to lose the nice partner he has.