How can I help my sister cope?

Question

My sister is 15 and live with my dad and step mom. This is a two part question.
Part 1: My sister 1 lives with my dad who is extremely verbally abusive. If she fails at anything at all she will be yelled at because he has high expectations for her. Also if she starts doing well then he reminds her constantly of her previous failures. Her grades start to slip because of the negativity. It is a constant roller coaster. It didn't use to be so bad, but now it seems whenever he yells at her for something he tries to get her to cry. My parents are obviously divorced, my sister's habits can remind him of our mother and he used to do that to mom. Mom is definitely not an answer she was extremely neglectful, but my sister seems to get the crap end of the stick either way. (mom lives in germany) How do I help my sister cope with this constant yelling/verbal abuse? My stepmom who also ignores my sister isn't much help, but my sister feels she can talk to her slightly more, however to no avail.
Part 2: My youngest sister (my stepmom + my dad's kid= half sister) has her mom guilt trip her all the time. Like if she doesn't do something my step mom will say,"Oh I guess you don't love me." then my sister begs and pleads with her mom all the time. Also, my sister feels if she's less than perfect or gets in trouble that my dad + her mom will not love her as much and has told "us" (other sis+me) so! It's absolutely pathetic and sad that her mother an RN does this. I don't know how to help her at all. I do not live with my sisters for reasons above and live with my bf a few states away. I need to figure a way to help them even if it means talking to my dad. Which is a feat on it's own...

Well! Thanks for any of your answers. I feel that my parents are damaging my sisters irrevocably and I just don't know how to fix these issues since it is such a sensitive topic for everyone involved.

Answer 1

tough situation; I guess my advice on part 1 that is something she can "do" is to make a list of her successes so that when dad starts going off (which she won't be able to control) she'll be able to inwardly do self-talk about what she does well - the thing for her to remind herself is this is not about her (which you seem to understand) and it is just about him being a jackass; Part 2 is harder because of younger age; she can't control mom and mom is being manipulative; all sis can do is be herself and try to be tough about it knowing that mom is just mom (i.e., manipulative, probably with everyone) - Part 3 for you - family is tough to confront sometimes and key is be calm and rational - don't play into their drama too much after all you can only do so much

Answer 2

Tachnically this is emotional abuse, and u can report it. Thoug hu will need ur sisters to tell social workers everything. Most likely all thy will happen is the piarents will be sent to classes. Though u could first try talking to ur dad and step mom alone and warn them that they are being abusive and thy u will report it if u don't see change. Other than that tell ur sisters to tell a teacher or other trusted adult.

Answer 3

Just let your sisters know that your there for them always and keep the line of communication open. Also, maybe mention to your father that he's too hard on your sister? Idk how easy he is to change or if it would be a bad idea to mention anything to him. Sometimes it needs to be put in black and white for people to realize their faults, such as telling your sister that her mom will love her no matter what she does or doesn't do.