My mil had a massive stroke shortly shortly after our engagement and is now is admitted to a facility that will care for her. She has dementia and I know it breaks my fiance's heart knowing she may not even know who or what is happening if she comes to the wedding. His sister has suggested she will bring her but I am hesitant because her behaviour is unpredictable and sometimes aggressive due to dementia. His father is no longer living and both of my parents are attending our wedding. My family has been very welcoming to my fiancé and I tell him he has a new extended family. Has anyone had experience with this?