South Carolina does have a cruelty to children statute. Almost every state in the Union now considers criminal conduct committed in the presence of a child an additional crime or at least an aggravating factor. So yes.
As we don't know enough about your case, you should not consider my answer to be legal advice. You would need to consult with an attorney at length and include details about what has occurred in order to adequately assess your criminal exposure. Also, I am licensed in the state of New York only. If this is a federal case, provided more information were given, we could give you a better idea of the sentencing range. If it is state only, you will need an attorney licensed in your jurisdiction to address this.