why 5 yr olds hate 1 year olds

don't get me wrong - big b and i talk all the time about the kids but we just had a meeting of the minds. the chunk actually is a bit of a sneaky one - likes to get his brother in trouble. every evening before bed m love gets to watch a bit of his dvd. big b put the chunk in bed with him a few nights ago so they could watch a bit together. after a couple of minutes there is a blood curdling cry - of course big b runs in accusing mb of laying a hand on his baby brother. no - there was no mistreatment, big b leaves again. a few minutes later - the same screams and the same accusations fly. the scene appears the same - children at either end of the bed - apparently giving each other much personal space. after telling me this story i remember that the same thing happened to me. i also came in guns a blazin'. i guess babies like to be supervised or have devious plots to get their brothers in trouble. i think it maybe a bit of both for the chunk. when are we going to get used to this parental thing?