I like the hypothetical question that someone's father-in-law put to us once ... if your children and partner were trapped in a car with a fire sweeping towards them, who would you rescue first if you could only rescue once? Of course everybody jumps at "what about the children" (more life to live/innocent lives/ couldn't live with oneself afterwards etc etc) but the true answer, if there is such a thing, is your partner.
Of course, the love you feel for your partner and the love you feel for your children is vastly different and saying "I love my husband more than I love my kids" is a bit weird. "Falling in love" with your child? Sounds a bit new age/romantic to me. I think it is an interesting anthropological example of cuteness tweaking our intrinsic protective instincts to care for the defenseless animal.