I'm highlighting this piece for the following paragraphs, which I think are more relevant right now than Madeline's paternity. (Although that is interesting too, of course, and could have some bearing on what happened.)
Detectives trying to prove that Kate McCann killed her daughter have painted the 39-year-old doctor as a violent mother prone to "hysterical reactions" and losing control.
...
Quoting police sources, the papers alleged that Mrs McCann became "visibly out of control" under questioning by police, and that witnesses had described her as "violent" and "aggressive" towards her children.
It was claimed that she routinely put Madeleine and the two-year-old twins to bed in the family's holiday apartment "while Gerry played tennis and lay by the pool".
...
Pamela Fenn, who was in an apartment above the family on May 3 - the night Madeleine disappeared - is quoted as saying she believed Mrs McCann sometimes became violent and "out of control" in the room below.
She claimed that "the little girl's screams calling for her daddy were very audible".
Another witness is quoted as saying that Mrs McCann "seemed to have moments of aggressiveness towards her children" and that her husband, "though more absent, had more emotional control".
Mrs McCann is said to have strongly denied both these allegations in police interviews.
Source: dailymail.co.uk
Frankly, I'm not sure that this information is warranted or helpful before the suspects have even been charged. It smacks of a campaign to discredit the McCanns, although the allegations of Kate McCann's aggression are troublesome nonetheless.
I await more on this.