i have a female cat her names nikki well shes never even had kitten's we have had her since she was a baby, well my mom wanted to get another lil baby to add to the family her dad's cat had 3 kittens and when she made them stop nursing he gave us one. every since then nikki has started purduceing milk for the baby ( i even looked to see and she is ) the thing is he is almost as big as she is now and he keeps on nurseing she wont make him stop ... can it hurt her to keep leting him nurse untill we have him fixed ?