Congrats on your daughter. What do you mean by out him for child support and if it is safe? You mean he hasn't started paying it? The problem with a 16 year old and child support is that he isn't an adult. His earning potential isn't much. So, at best, you'd get the minimum of your state. A 16 year old usually has an hourly, low paying job and only works a few hours a week. I wouldn't count on much financial support just yet. Now, once he is out of high school, goes to college, etc, his earnings will surely increase and then you need to be prepared for going back to court to keep increasing how much he pays to support his child. Hopefully it won't be a battle and he'll turn into a good dad.
Wait-- are you talking about statutory charges with regards to your being 20 and his being 16? That is state dependent. What state do you live in?