A.A.
Hi T.,
Some babies do need more attention than others, some are "high needs" as Dr Sears calls them. A 6 month old is too young to be spoiled, though, so it's got to be something real - or real to her young mind at least, which is indeed legitimate. She may be teething, she may be expecting the same treatment her mom gives, she may be overwhelmed somehow while with you or have some strong preference yoiu're not yet aware of. I'd let her mom know about the trouble you're having and see what ideas she may have. Good luck!