Beware of estate contests. Some irresponsible, greedy relative petitions to run the estate. Your client objects, offers proof and files their own petition.
The court may step in, appoint someone, and, if experience is any indication, its out of BOTH parties hands, the thing drags on, and an attorney who's unfamiliar with the case gets a huge fee.
That's happened.
So get together on the same page to prevent things getting out of control.