<human>: my dad who is currently unemployed, or employed-off and on for the past few years, has been borrowing money from my little sister since 15 when she started working under the table. basically, he asks for money and she has been giving it to him, the first time it happened they were asking her to put in for "rent" monthly, then he began borrowing it outright. i was surprised when he paid her back the thousand dollars or so he owed her last year (the debt was outstanding for over a year). 

now that she's in college, she has money left over from her student loans. my parents know this. it was recently revealed to me that he borrowed $1100 dollars from her with promises to pay it back "soon". apparently, i can't let my parents know that i know. turns out, my mom found out and was not happy about it. 

my sister is going to be struggling financially because of this. right now, she is looking for short-term employment to cover rent for her apartment. 

my parents never asked me for money because i never had a high school job, so they only ever ask my sister. they also never told me about the large sums of money they were borrowing from my sister. my younger brother [16] has a part-time job now, so i'm worried that it might start happening to him.

it is important to note that i do not have the best relationship with my sister and when i brought it up to her that i thought that it was wrong for my dad to be asking for money, she got very defensive and tried to  make it look like i thought that she was in the wrong for helping my dad.

reddit, what do i do in this situation? do i say anything to my dad? should i tell my sister to stop lending them money? i'm mostly scared of my dad becoming dependent on my sister as their financial scapegoat and then doing the same to my little brother. She's just starting college and should not be using her grants and loans for this type of thing.

Can you give me the gist of the text in a nutshell?
<bot>: my dad who can't hold a steady job has been borrowing money from my sister for a few years now. he recently borrowed a large sum of money from her that has the potential to cause her financial distress. what do i do?