Not trying to open up any cans of worms, just trying to figure out, in general since every state varies, the deal with child support if both parents are primary resisdance for one of their two children. Ie. SS lives with DH and myself and SD lives with BM. SS has been living with us since the summer but due to some work things, DH has not been able to go to court to modify the support until now. We have been paying daycare, food, and private medical insurance (and eveything else for that matter) for SS since he moved in and she hasn't offered to give any of the child support she was receiving for BOTH children towards any of these expenses. SHe mentioned this evening, court is in the beginning of next month, that she doesnt think its fair for her to not receive something for SD because she has to travel to all of her medical appointments (no more than 20 mins) and on her accord because by CO she is supposed to tellDH of all medical appts and she never does. SD is on disability so she receives a check for about $700 a month for that, she is on state insurance so all medical expenses are covered and she only eats through a gtube which all the supplies and formula are covered 100%. She also has a home nurse there while BM works full time, who is also covered by the state...Just curious because I had always heard that if both parents have one child, they would owe to each other support so it eliminates...and if not, can she really try to pull that gas money is equivalent to all the expenses that DH has to pay that are not covered by the state??