This is my first time posting on here. My partners mum is elderly and just been diagnosed with dementia and has been poorly for the last few years me and h2b has been helping her getting extra carers in etc taking her to appointments and now all of a sudden her other children have stepped in and trying to take over. When we have asked for help in the past etc with her mental health declining etc they haven’t bothered or even visited her until now. I went to mil2b today to take her to an appointment and future sil refused for me to take her and said mil is to poorly to take to an important mental health appointment. The whole time I was there the sil ignored me and treated me like I was s**t on her shoe. Sil is not happy that mil wants me and hubby to be her power of attorneys as we both know she doesn’t want to go into a home (wants to stay where she is and die at home). Mil is concerned her daughter is going to bad mouth me to others. When all I want is best for mil. Btw I’ve been a carer for the elderly (end of life) and those with neurological diseases for over 10years I still care for ppl with neuro diseases so that they can stay home and pass at home. How do I deal with a jealous sil ???