It's common for couples who divorce while their children are young to want to want to get married again after some years have passed. At the same time, one of the common questions that they ask a Florida family lawyer before they walk down the aisle is if their change in marital status impacts their responsibility to pay child support.
If the noncustodial parent decides to walk down the aisle again, then their decision rarely impacts how much child support that they owe, even once their income gets combined with their new spouse's.
One instance in which you may, as the custodial parent, have a case for petitioning a judge to award you increased child support is if your ex gets a significant promotion or raise. If they do, then you may be able to argue that your child deserves to benefit from their enhanced financial situation.
If your ex decides to adopt their spouse's kids or to have their own with their new husband or wife, then they may think that doing so will motivate a judge to reduce their monthly child support obligation. This rarely happens for this reason though.
Judges in Kissimmee tend to only approve a noncustodial parent's request to reduce the child support payments that they're ordered to pay on a temporary basis if they experience a decline in their income or if their household expenses suddenly increase.
If your ex has threatened to petition a judge for a child support modification because they're getting remarried or having another child, then a divorce attorney can advise you of how successful that they're likely to be in doing that.