That would be the only redeeming part of that girl's personality. I'd be fine with her overly attached typical female character if the deep trauma in her childhood was perpetuated for the rest of her life. This is why I'm willing to think the Doquixote Family hasn't cared for her, and actually kept favoring and inciting her trauma. Which wouldn't be that absurd, since we ahve seen proof that Doflamingo has been killing every "husband" of hers, which could mean he didn't want her to attach herself to anyone but his own purposes. And even Trebol used her for money, and he has been hinting to be the mastermind behind Doflamingo.
So yeah, I want to think the Donquixote Pirates didn't care for her, and even contributed to her trauma (even if subtly)