I dont know about signs, but she announced her candidacy within a couple days of his death. Pissed off the Kennedy family.
She’s was testing the waters while he was sick.
Coakley made no secret of her desire to run for Kennedy's seat well before Kennedy died in August of last year. Kennedy nephew Stephen E. Smith later told the Boston Herald, "She set up a committee six months before my uncle died. There were people on the corner with a huge 'Coakley for Senate' sign two days after his funeral." Coakley formally announced her candidacy a week after Kennedy's death. One of Coakley's main rivals for the Democratic nomination, Rep. Michael Capuano, told the Herald, "I couldn't do it. I couldn't step over someone's grave."