Because he's her dad, he isn't some random people on the street. I wasn't comparing dad vs mom, but dad vs random people that aren't related to the child ! But I get why you were confused by my formulation lol (I edited my comment to be more clear)

&gt;It is not abusing, as she has no clue of what it means. The kid is not  hurt by it. If anything, she is hurt by the way-over-the-top response  from the mom, as this is the reaction making it actually meaningful or  hurtful. It is the mom who is offended, not the kid. And the mom has a  choice.

First, at 1yo child begin to talk, so she'll rapidly get that bitch is a word and if she associated her being a bitch, while others use that term negatively, imagine what she'd felt. But, whenever she can get now what a bitch is or not, its not a valid excuse ! Its like," you can hit your child, she'll not remember as being an adult so who cares ?" mindset. Its not because child can't express consent over this or express discomfort that we can do what the fuck we want ! Its called respect and its what children must learn. Who can you expect being respectful if your dad joke about you being a bitch at 1yo ? If she was older, surely he wouldn't have say that, so why saying this now ?