Why does my sister get so upset so easily? Had anyone been through this?

My sister has had a lot of problems growing up, we moved houses when she was 10 (i was 8) and she instantly didn’t seem to get on well at school. Meanwhile me, her and all my cousins where subject to my uncles inappropriate behaviour with us all (although not physically). After this was discovered and my uncle was told never to come near us again, my sister was moving up to senior school where she was being bullied quite badly. In year 8 she was beaten up by a massive gang of the bullies outside the youth centre (i was there and saw it all) and my mum took her out of school and placed her in another. She got on OK and made some friends but again was subjected to bulling by some of the kids that knew the main girl of the gang in her previous school.

Anyway she did not get on well at all through out her school life and often cried her eyes out if she had to go in or truanted from school. She eventually left early (when she was just 15) and started working in a local shop. Things where finally looking good for her until she met her first serious boyfriend, she was pregnant by the age of 17 and gave birth just before she was 18. Just after she gave birth, her boyfriend, herself and one of his mates ended up in prison for a something they where all very stupid and out of order for doing. She missed her son's first Christmas and when she came out 3 months later she found it difficult to bond with him and therefore found motherhood extremely difficult.

When her boyfriend came out of prison 11 months after her, they moved in together until she found out he was cheating on her with her best friend, he later moved out.

The next 4 years went by, she lost a lot of her friends as they where split between my sister and her ex best friend, and therefore she didn’t get a lot of visits or go out a lot at all.

She started working in a pub where she met another guy, and to be honest i don’t think she has been as happy as she was then, she was earning money, had quite a lot of friends and a lovely boyfriend. This again soon ended as she was not seeing her son a lot due to the hours she was working, and her and her boyfriend split up (although she seemed a lot stronger through that split).

I don’t want to go on forever but she has also had ALOT of trouble with her neighbour playing music in the early hours, fights and parties at all hours, and therefore she came to blows with her neighbour quote badly as well, she ended up in a fight with one of her neighbours friends, the police / council didn’t do anything and she was having to deal with the whole thing with no support. While this was happening she became very good friends with a girl down the street and therefore got out of her flat a lot and had someone that she could tell anything. They became very close and it was nice to see she finally had a friend who she could trust. Her friend worked full time and so my sister looked after her kids and generally did a lot of errands for her during the day as my sister was not working.

Her friend then managed to get her a job at the nursery she is working at and got her enrolled in a child care NVQ, i was over the moon as things where finally starting to look up for her.

That was until her friend started acting really weird and basically started being nasty, she started to have a go at my sister for the smallest thing and they now do not get on at all. She called my sister out of the blue a month or so ago telling her she wanted her keys back and that she had heard that my sister was bitching about her! My sister was completely shocked as she was so grateful for her getting her the job.

This is where she is now. She's bursting in to tears at the drop of a hat and is getting very stressed out with the job as the majority of the women working there are complete bitches. i know she does not eat properly at all and hasn’t for as long as i can remember and as a result she has bed skin and always looks knackered. I thought the tears were because she needed to get used to the early mornings and going to work but she has been there for over 2 months and she is still so sad. She told me that she spends most on the nights and Sunday worrying about works and preying for the end of the day.

I’m so worried about her but i don’t know what to do anymore, has anyone suffered from the same kind of thing or know anyone who has? Is there a cure or anyway she can stop herself feeling so down and crap about herself. I wish she could move away from the street she is in as she has so many bad memories there but the council are not obliging at all.

Any suggestions would be appreciated.

Thanks x