Does anyone think that there might be some truth to the theory about Jesus and Mary M. in The Davinci Code?

I think that the author's theory is very interesting. If you look at the painting of the last supper there is a v shape between Jesus and Mary Magdalene. They are wearing the same color clothes, just flipped. And some of the deciples are glaring and pointing at Mary. I was wondering if anyone thought that Jesus and Mary were actually married or were partners? I am not sure. And if anyone does...do you have a theory to why Leonardo Da Vinci knew or to why he speculated that?