<prompt> Translate the following text to EnglishLakini monogamy ya mfululizo ina hasara kubwa ambayo haishirikiwi na watoto wengi hupandwa bila baba au na baba wa kambo, ambao mara nyingi hawana ujitoaji wa Darwin wa baba wa kibiolojia - na ambao wanaweza hata kuwa adui kabisa.  <response>: But serial monogamy has a big downside not shared by Lots of kids get reared either without fathers or with stepfathers, who often lack the Darwinian devotion of a biological father--and who may even be downright hostile. 