Sometimes mother's try their possible best to put children in order but they sometimes resist because of the in built ego and this can not the cause of motherly love.
On a personal level I use to believe that my mother loves my elder brother who where never around since my childhood but when I go to the university my kid sis kept tell me that my mom loves me more than everybody. it keeps reoccurring then I knew she loves everyone equally. you do know about the story of a Shepard who lost 1 sheep out of his 100 sheep so he left 99 to look for the 1 that was show that one lost sheep is more important than 99 that is the same thing with my case. my mom just cares about that 1 that she's not seeing for the mean time. So is applicable to all mothers they show love to that one child that since to be lost than others in order to bring that one close too not to be misguided.
In logical reasoning you conclusion is proposition that is not correct or maybe correct in some sense. it is an invalid argument because the premises (The above mentioned things e.g laziness, Enemity amongst the family etc) do not logically imply the conclusion or let me say the conclusion does not logically follow from the premises.
I write dis tin for English because I want make anybody wey go read am understand am well. And plus say op himself write for English.