It's a sad day when you have to do it, but sometimes it has to be done. 

Especially when it comes to family it's hard to draw the line and say enough's enough. 

 Life isn't always this clear-cut.  Sometimes there are other family members involved that need to be accounted for.  Regardless of the situation never feel sorry for yourself and write down and learn the parasitic patterns and rehearse them prior to engagements.