Kaykay - you say you don't want to get into a fight with me, and follow up with a confrontational "I don't see where you get off" and "it beggars belief"? 
If I am manipulating OP to stay calm and composed, then you are doing the exact opposite, and I quote:
I'd probably also slap him or spit on him, but I might be a little extreme when it comes to family.
My first thought was "I would destroy the barmaid's entire life and probably castrate him", so at least I've got it to within legal perimeters..
OP - There are some times in life when it is better to bite your lip, keep it inside, and take the high road.
This isn't one of them.
The trick is to make sure you get it out of your system in one fell swoop. Once. Just once.
Don't have a massive rant at him, then think of something else a few hours later and text him with "OH AND ANOTHER THING YOU PIECE OF WANK..." because that way a harrassment order lies, and that would probably suck balls.
If I am trying to manipulate OP, then so are you, and so is everyone on this thread, or any thread ever. The only difference being that you would rather she be confrontational and violent, and I would rather she deal with it calmly and with dignity. Ultimately its up to the OP.
I said I didn't think OP's sister would want her getting into trouble, and I stand by that. Why would she? Unless her sister was a horrible person, who wants to see the OP suffer even more?
I'm not trying to "manipulate" the OP - don't be ridiculous. I would like to see her get over her anger in a constructive way that is not going to cause more agony.
Canshop - sincere apologies that the thread has stooped so low. As I asked in my last post - are you OK? I am genuinely concerned for you, in a way I never really have been for a poster on MN.