I'm not sure if this is the proper subreddit for this or not, but I'm tired of this and I need other opinions.

With that said, here is the backstory. My girlfriend(15, March birthday) and I(18, February birthday) aren't allowed to legally have sex because of our age difference of 37 months and 11 days. The legal age of consent in my state is 16 with a leeway of 36 months before the age of 16. We haven't had sex, not just due to this law, but because we feel like the relationship is just fine right where it is. We're completely fine with staying abstinent. For the record, we're both virgins. We've been dating for about 6 months, though we might as well have been for 3 months prior to that.

I'm not here to be judged on our age, maturity, what have you. I'm here looking for help.

The girls parents(divorced), don't like me, despite having made no effort to know me even in the slightest. They don't even know my proper age as they constantly call me 19. She lives with her mom and her step dad. For two months of our relationship, her mom completely denied any communication between us. Actually going so far as to completely cut her off from communicating with anyone and forbidding her from even leaving the house for so much as walking around the neighborhood. Over time, things have gotten slightly better with her finally allowing us to speak to each other again at the beginning of the month.

Now here's my problem. Her mother is emotionally abusive. She constantly degrades her daughter(she frequently makes jabs at my girlfriends weight even though she's had eating disorders in the past. My girlfriend is 103 and 4'9"), even in the company of her daughter's friends, and then later denies it in the company of anyone slightly older than her daughter. To add to that, both of my girlfriends parents constantly threaten to call the police on me, despite me having done nothing. They call me a child molester and a satanist(I'm neither). They constantly blame me for their daughters passive atheism, despite her coming out as an atheist to me before I had come out to her. They say that I'm causing them family problems and all I've done is talk to her.

They won't listen to anything she has to say. My one solace is that her step dad actually understands and helps her.

About an hour ago I received the following text messages from her dad(how he got my number is a mystery):

This is (name)s father.I need 4 you to quit talking to (name) do much.she's lucky she's able to talk on phone so much.iv told her that maybe and only maybe afte r she's 16 for a while,she might can c you.she's talking to you at school and as early as 5am.this is redicilous.if you can't back off and wait for her to becom e a women then I will take legal action.consider this a written warning.iv had enough of this I love you crap on the phone.she's 15 and your 19.that doesn't set tle with me to well.like it or not we don't approve of it. If you think your marrying her to make her mom mad,your screwed up pal.you turned our daughter into a atheist.you've caused problems with her family.your lucky we haven't called the cops.backoff or next conversation will b face to face man to man

She sends me a text message or calls me when she gets up to get ready for school. She rarely texts me in class. We've talked about marriage, but not as a way to piss her mom off because, frankly, that's just plain idiotic.

I'm tired of the harassment from her parents without reason. So my questions are these:

Is there anything I can do besides wait it out for the next two months?

Is there anything legally that her parents can do to me?

**Edit: It may not be apparent, but I live in a southern, extremely conservative state. Hence the religious issues.