WA State Son to be successor Trustee. Forced her to give up her house, & live with him, then throwing her out, as he wants a LONG cruise. Refuses to speak to me, his sister, won't say why, even re: plans to transition her to live with me, in CA. He has her amending her Grantor Trust, she signs, as still lives with him, but doesn't understand repercussions to my 50%. She's usually competent, but in & out re fixing muddy trust. He used to be a good son, but now mentally hiding in luggage compartment of bus he's supposed to be driving. I'm willing to drive the bus, & can take her in two months, but how do we change Trust terms w/o alerting him, as may be meaner to her & take "joint" $ . He feeds her/not physically abusive, but mentally treating her as an annoying stranger.