A reason to not have more than one kid.
A mother was washing her three-year-old daughter in the bathtub, while the five-year-old boy and the six-month-old baby were in the sleep room. The little boy found the soft part of the baby's head, and without knowing the consequences, he pushed his finger hard in. The baby died, and shocked at what he had done, the little boy ran out of the house. The mother heard what was going on, so she ran after the boy. The boy ran into the traffic and got hit by a truck. The mother watched in total shock. When she went inside again, her daughter, not able to swim, had drowned in the bathtub.