Would Diana have gone back to Charles if he wanted her?

With Diana back in the news thanks to The Crown, what about the suggestion that Diana would have returned to Charles had he wanted her back. Tina Brown suggests, "“One thing she had finally done was really understand that Camilla was the love of his life, and there was just nothing she could do about it. But she said to me at that lunch that she would go back to Charles in a heartbeat if he wanted her.”

Meanwhile, the Royals are said to not to be happy with Season 4 of The Crown