Can I be charged for talking to my girlfriend who is a minor?

I just turn 18 we were together in a relationship before I was 18. She is currently 15 and turning 16 in 19 days. Her mom caught us in the same bed about a week ago and she did not press charges or go and get her daughter tested for anything. She does not want us still talking but we are. She just found out about us talking today. We are just texting back and fourth, there is nothing sexual in our message just talking. She is telling me to stop talking to her or she will press charges against me. Is there any charges she press against me? Sorry if I did not pick the right topic I wasn't sure which one to pick.