If your cousin is the biological father, he will have an obligation to support his child until he/she is emancipated or turns 19, whichever first occurs. Obtaining custody is another issue independent of the child support matter.

If your husband is making less money now than he was at the time of the divorce and establishment of the child support amount, he needs to file a motion to modify child support immediately. Any order modifying support is retroactive to the date the motion is filed.

Your husband’s x-wife can obtain a judgment for all unpaid past due child support. She can lien the house since his name is on the title. She can lien vacant land or anything else which is titled in your husband’s name.

No, it is not true unless his daughter has moved out of the house and is now supporting herself. Otherwise, your husband’s obligation continues until she is 19.

It depends on whether or not the parents were married, and certain other facts which will determine whether or not the modification is retroactive to the date of filing or further back. If the parties were never married, and there is no prior support order, then YES the court can order child support retroactive to the date the kids were born. The obligation to pay child support terminates when a child turns 19