I have always loved and had a good relationship with my SiL. (DH's litttle sister). For the last 6 years she has lived on the other side of the world. She went with her DH who has had a series of glittering expat positions and they now have two small DC. I have visited her twice to help when her DC were born and have always felt very close to her.
Sadly I feel that my relationship with her is being compromised by the difficult situation we are in with MiL. I won't go into all the detail but MiL has alzheimers, is in denial that anything is wrong, is trying to live on at home and expects my DH to be at her beck and call. She has always had a difficult personality and the illness has made it worse. At the moment she is temporarily in a nursing home after a fall but is insisting on being released back to her home. She has also tried to break out of the nursing home. We live in a kind of permanent black cloud of worry about MiL and spend many evenings ( when DH is home) arguing and discussing what we can do. Every weekend is framed around visits to MiL. Evenings can be filled with phone calls from her. We rarely go away and feel very guilty when we do. Meanwhile SiL posts on facebook about lovely family holidays, outings with friends etc. I know much of her day is spent wrangling small children and is not glamorous or easy, but I just feel it is so unfair that she has a life in a way that I don't feel we do any more.
She is coming to Melbourne at Christmas for a couple of weeks most of which will be spent with her inlaws. If it is like last year's visit, she will see her own mother two or three times while she is here. This provides no respite for us.
Last year I did say to her that I thought it was not fair and she has no idea of the daily impact on our lives of her mother's health condition. Her position is that their lives revolve around her DH's career and she does not have a vote on when or if they will leave the expat merry-go-round.
How can I preserve my fondness for her while I feel so resentful?