Ok obviously I missed a couple of things
What you write, is what is read. "We" are broke, broke, broke. This is her money and in my opinion if a boyfriend wants to help and ask for advise, he would write "she is broke, broke, broke". You don't come into it.. The word we, suggests it's affecting you as well and you want the money as well.
Can't read it any other way.
My advice was for her to write a letter to him telling him how she feels,
That part of your paragraph I totally agreed with.
telling him to cough it up or she will sue him. I know (and she does too) that the only way she can build a relationship with her father is that if this is out of the way. I think she knows already what she needs to do besides just wait, or do nothing
Secondly: I have never told my gf to sue her dad before and I would never try to coax her to do something like that. Holy hell what kinds of people do you normally deal with "Found Soul?" I feel for you bud, must be a hard road.
So, now that you have added, you are stating that you "have" told her to sue him, this time, never before. Do you think that will build the relationship? Or will it crush it for good. She'd more than likely send him to jaol in your words, your advise to her in my opinion will not give them a better relationship if this occured.
I preferred your first method.. Talk to him.
My gf is now faced with this decision and her alcoholic mother phones her once a week or more trying to push her to do it.
It helps when you add the whole situation into the equation. So what does the Mother have to win if she does?
I'm not doubting you love your girlfriend, but remember this is the Internet you state "we" and talk money assumptions will be made.
And, lastly your words to me are of anger.. Keep it in check, last thing she needs is a reminder of her childhood... And, dude, I'm a female... Now who's making assumptions.
She needs to seek professional advice, she may have to let it go and cut ties totally with her family and you both may have to get part time jobs and support each other, defer school a year and find 2 jobs each, what ever it takes to survive. You can't count on anything in life, other than what "you" do to make it.