Tsk! Tsk! Tsk! After so much information posted on Petfinder on spaying/neutering there is still so much confusion ......
Anyway,
Sphinxlover, if your mother threatens to kill you over such an issue, then ask her to do so, and make it as quick and painless as possible because it sure does not look like she loves you adequately as a responsible parent, seriously or otherwise. And if she can kill you, seriously I do not think she really loves that kitten anyway nor is she really capable of loving anyone or anything.
My 2-sen ...