<human>: Can you provide a brief rundown of the text in within 3 sentences?

Here's the deal, my girlfriend and her dad are not on the best of terms, the family is very religious and my girlfriend is too, he doesn't know that we are dating but her mother has an idea, I am not of that religion and nobody outside of my girlfriend knows that part (at least in her family).

We've been planning this 5 hour road trip to a major city for months, we booked the hotel and are set to leave Friday, her mother told her father and he does not want my girlfriend (Jen) to go (he even thinks that Jen is going with friends) He has threatened to stop eating and has even followed through in the past, he is diabetic and not eating the best so this obviously concerns my girlfriend. 

My point to her is this: if she gives in to him she is showing her dad that STARVING himself is a great way to get what he wants and should be done any time he needs something. 

Her father just started speaking with Jen about 8 months ago after many years of not. She is also going through a lot of stress at home because her cousins are in from out of country and she has started a new class for grad school prep.

I really don't think this is healthy please help us out with this reddit!
<bot>: My girlfriend's father has starved himself in the past and is threatening to do so how to stop us from going on a vacation