Let me be ludicrous then, following the birth of our second child my partner had a major psychotic breakdown that took about a year to largely resolve. During this time I had sole care of both children. The youngest child bonded almost exclusively with me and it has taken some 12 months for the mother child bond to be reforged. I would suggest that children bond with who ever provides their practical every day emotional and physical care, be it mother/father or a passing aardvark. As an aside I view as one of the greater tragedies of the social organisation of work under our variant of capitalism that so many men are largely alienated from their children (and would be unsurprised if this didn't account for a number of men's psychological problems).
Cheers Bill Cochrane