Legal Question in Wills and Trusts in California

If your mother is alive, in most cases you don't have any right to information regarding the trust until your mother's death, unless you are her agent under a durable power of attorney or if you are appointed by the court as the conservator of her estate.

While I can't really judge what's going on here, isolation of an elder is a classic symptom of elder financial abuse. You may want to contact Adult Protective Services and ask them to look into the situation.