...so she can manipulate the MC, but yes, she has. I'd trust Isabella's take on her
way more than Nanami's faux, "Whoopsie-daisy... I don't know how to drink from a bottle; I put my mouth...
here... do I?" Especially since she's tied directly to Madison, which obviously has only the MC's best interests in mind.

Honestly, I find it pretty irritating that the MC is like, "Herpa-derp! A damsel in distress? She's such a cutie-pie! I'll just ignore my
actual daughter and let this stranger pull me around by the nose everywhere."
Yes, I love Nanami's physical appearance (minus her blimp-sized breasts), but her personality and clear manipulation is a bit grating for my tastes. To be fair, I hate it when
any character acts like they have helium in their head.