An unmarried (with no kids) relative of mine is re-doing their will but her companion is drafting it for her in a web tool. The companion is drafting it in a way that they are the main beneficiary as well as the executor and durable POA. I suspect coercion is taking place.
Good luck to you.
I agree with lealonnie1, that if your relative doesn't have any impairment then it's her decision.
If she's only known this companion for a brief time and you now for a fact that she's changing her Will as you described, then I also agree that you need to have some very hard proof to involve APS or an attorney. That's your only recourse.
Do you think that he is pretending to be her companion only to get her money?