From the official Death at a Funeral website
KEELEY HAWES - JANE
Jane knows her role: the good, supportive wife to Daniel. And that’s OK, because, really, that’s all she cares to be. So long as they get to move out of his family home. She just doesn’t have it in her to take care of Daniel’s newly-widowed mom. It’s time for them to move out on their own. After all, Daniel’s brother Robert took off years ago seeking fame and fortune. Now it’s their turn – if only Daniel would call about that flat they’re interested in. Why won’t he call? Has he changed his mind or is something else going on? Fortunately, Jane’s the kind of girl you can trust, even about the most bizarre things. Like family secrets, and blackmail, and oh, maybe murder. Just keep her in the loop, and she’ll never lose the faith.