story of son sleeping with mother a lot n like to bite her nipples alot
It is surprisingly hard to find that story, searching 'bite' + 'nipple' returns way to many results, not to mention there are a couple of incest stories on SoL, if you look hard enough... What really makes searching difficult is distinguishing those stories were circumstances require a mother and son to share a bed in which to sleep, as opposed to those in which fornication takes place.
Perhaps if you could recall some more specific details? Breast size, hair colour, etc you might increase the chances of a worthwhile response