Samantha Cameron and Labour

I suppose it was too good to be true - the wife of the Tory leader supporting Labour at one time. I must admit to being quite amused at fellow Tory MP Ed Vaisey being the source of the story. He clearly has a great deal of egg on his face now, following flat denials from Tory HQ of it being the case. With a general election so close, the rumour mill is in full motion. What will we hear next?