Legal Question in Family Law in Maryland

Generally the court will not factor in child support payments not made pursuant to a court order, as there is no legal obligation to pay them. If you have a written agreement pertaining to support of the younger child, the court might give it some consideration. More significant would be an increase in the mother's income from what it was when the original order was put in place, although changes in your income from then would also be a factor. If you can find out what the mother's pretax income is, you can add it to yours and see what the MD Child Support Guidelines, which can be found at http://www.lexisnexis.com/hottopics/mdcode/, calls for. Click "I agree", and on the next screen check the Family Law box and type in "12-204" in the search box. This will give you the table. For example, if you and the mom were each making $43k, you would each be responsible for $780/mo in basic child support. This would go up or down depending on who is paying for their health insurance, and whether you get credit for the 4 yr old. Since the mom probably won't voluntarily share her income info with you, you would have to file a petition for modification and get her pay info via discovery (and she'll get yours).