DS (sister) bought land with her new boyfriend after her divorce and moved into our parents little house with her son while waiting for planning, which still hasn't been approved 1.5 yrs later (it was turned down and waiting appeal). DS has bought several pets despite being told not to, contributes nothing on bills/rent while showering boyfriend with gifts (luxury hotel weekends, designer clothes, etc), buying horses etc, and is generally rude and moody on the verge of abuse. Covid has delayed things further and now she has broken her ankle my elderly parents see no end of this. Even worse, her boyfriend is refusing to help DS leaving everything to my parents who are vulnerable and need to isolate for their health. They desperately need to sell their home and mum cries every day as she sees no way out. They are becoming very old and frail and I am worried their health may deteriorate very rapidly if this is not resolved by the end of the year. I am.looking to move house but cannot afford anything big enough for all of us.
Does anyone have advice on what they can do to get her to move out. They have offered to pay for a place to rent for six months but she refuses. The main issue is her son is only 9 and they love him obviously but he is used as emotional blackmail.