His mom & I have a great co - parent relationship . I work seasonal 1st shift & take on line college courses , she works 2nd shift so I have our son up to 90 percent of the time . He has his own bedroom here . I remarried & my ex allows us to claim my son on our taxes & I write his mom a check for half of his tax credit ( $ 500 ) . Everything is truly 50 / 50 . This arrangement has been in place since 6 / 10 . She works as a waitress & gets enough aid for her rent . I have mortgage / vehicle / utility payments , etc . Now social services filed against me claiming that I have FAILED to support our son & they want to make me pay child support which may open old wounds & actually take money from me that I use on my son's behalf . His mom & I are livid & she is going to court with me to fight on my behalf .