The other sibling

I have another sibling, younger than myself.  She is a really nice person.  She is that person who is just happy with her life.  She has a loving husband who treats her well and they have a healthy relationship.  She is very strong in her faith and looks for the best in everyone.  I love her.

My younger sister has her own pain from our toxic sibling (TS).  She has been abused and mistreated all her life as well.  I cannot speak for all her experiences.  That is her story to tell.  I have seen TS call her names and belittle her and humiliate her.  She takes a different approach than I.  She takes TS in small doses and loves them anyway.  

Perhaps it is the amount of time I am exposed to TS that makes it impossible for me to have small doses.  We live one street apart.  

TS not only belittles my younger sister to her face and in public, they also talk about her all the time behind her back.  They call her pathetic and a loser.  They despise her husband because he is not good enough.  They just have not one good thing to say about  my younger sister, but they act nice to her face.  Her husband is always treated like he doesn't belong.  TS always makes it seem that they are the better person even though they do these things.  For example:

Years ago my younger sister was going through a hard  time during a divorce.  She lived in poor conditions in another state.  My husband had recently passed away and I had room in my house so I invited her to stay with me.  TS went off on me.  They told me I was stupid, the other sister was a slob and lazy, that I would regret making such dumb decisions.  TS said I have better not expect help from them in supporting this loser.  Period.  I stood firm.  My younger sister came and got on her feet.  That is all she needed from me, a chance to get on her feet and start a new life.  On the flip side, TS told our younger sister that inviting her was the idea of TS and I was resistant to the idea and had to be talked into it.  Total lie.  That is how toxic people operate.

I ask myself why?  Why does this kind woman allow herself to be treated horribly?  Maybe my view is biased due to my experiences and she does not feel like it is that horrible.  Maybe after so many years of  TS she also overlooks the worst of it.  After much pondering, I realize that is her journey.  I have to love her for the wonderful person she is, and let the rest go. She will have to face her own battle, or not.