Just because someone is family doesn't make them a friend & doesn't mean that you have to waste your time & effort trying to make a relationship work. Some people we just have to write out of our lives.....you can only do so much.....then you have to accept it for what it is.....NOTHING & don't bother going back or dealing with the family drama....remove yourself from ALL of the situations that touch her life.

Sure, your dad is in the middle.....but you can see your dad when you don't have to have any contact with your sister & you don't even have to let your dad know where things stand as in reality, it's NONE of his business either.

Yes, holiday's are a tough time of year because it throws us into family relationships we really don't want to bother with.....but sometimes it's best to just stay within your own little family unit & not bother with the rest......& you don't have to explain...just saying that you will be only getting together with your own family....if your boys want to visit the rest of the family....that's their business....but it doesn't have to be yours.

Know it's difficult, but it's the healthy thing to do.