What's the harm in polyamory? This, this is what worries me. Boyfriend #3 puts baby in hospital "w/ broken leg, arm, ribs & skull fractures" because he was "frustrated due to his inability to get any sleep while baby-sitting" baby girl unrelated to him. https://www.jacksonville.com/news/20200325/jacksonville-man-jailed-in-abuse-of-5-week-old-baby

Recognize this is N = 1. But there is a literature on the ways in which unrelated adult males elevate children's risk for child abuse & neglect. See, e.g., https://www.sciencedirect.com/science/article/abs/pii/0162309594900140?via%3Dihub

More on this polyamorous Florida family here: https://nypost.com/2019/12/06/polyamorous-florida-woman-with-4-boyfriends-is-pregnant/