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: A little bit of background, my sister and her husband are both narcissists, we havent been close in years. Only catch up a few times a year in family situations, and usually try to keep the peace. Have so many stories about their behaviour, but that's for another time. 

She has recently given birth to their first child / grandchild for all families involved. My other siblings and I can already see how this poor kids life will turn out with 2 narcissistic parents, and would love to protect this child as much as possible. 

I'm due with my first child in a few months, and my sister has started going on about how good that the cousins will be so close in age, they'll be the best of friends etc. 

Our parenting styles will be quite different due to our personalities, and our different partners etc

WIBTA for not allowing my child to have a lot of access to his cousin based on the past actions of my sister and her husband? 

not allowing cousins to grow up together