My Ex husband and I are divorced , I have full legal and physical custody of my daughter . I am considering changing my job , but my work hours would jump from 40 hours a week to 60 + hours a week . My mother will help pick my daughter up from the daycare every day and will and stay with her until I get home . My Ex husband is dreaming of getting better visitation / custody arrangement which has been signed only 6 months ago . Per our Stipulation of Settlement , my Ex husband does not have the right of first refusal . I am afraid that my Ex , who works very little , will use my new work schedule to his advantage , saying that he ( his daughter's father ) and not her grandmother should spend the evenings with the child , when her mother is not available . Do I have a valid concern ?