Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Some backstory, my partner is a triplet. One of the other triplets has 2 young kids. The one girl is ready for preschool now. 

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My partner is demanding to be involved in the school selection, thinks that the eldest girl is gifted (despite the child being clearly delayed). Her sister is on board with helping, but they are all very codependent. Both kids were fathered by an alcoholic abusive man who makes no contributions to raising them, but is at the family house every day to keep control. The mother lives with her parents as well. 

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My partner is utterly obsessed with her one niece, but not the other. The niece she is obsessed with is a little terror, identical to her father. She often displays signs of developmental delays and aggression. The other is very sweet and calm, very easy going baby. She calls the older niece 'her baby'. Will literally tell people that it is her child. She will interrupt peoples conversations, appointments, etc to talk about 'her baby'. I know she is a triplet and they have stronger bonds, but this one is a daily issue. We do not even live in the same city as the nieces. I find it embarrassing when she talks to others outside the family, that have confused looks and look to me to clarify or explain. 

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Each time 'her baby' goes to any appointment, she demands to be there. Will throw a fit if they go without her. She gets extra gifts for her favorite niece, will get a little something for her each time she visits, or on other peoples birthdays so 'her baby' doesn't feel left out. I have talked to her about the bias and how she is inevitably teaching the kid to expect gifts and be demanding. 

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Am I the Asshole for thinking all this or is she just have really strong family bond. Especially with the first born niece. 

thinking my partners relationship with her nieces is inappropriate