Aunt Jennifer's Tigers

Aunt Jennifer's Tigers to me seems like shes talking about her children or something shes looking after. To me the poem seems to relate that, what she is talking about is her children. How they are her shining diamonds in a new world. She speaks of motherly things she does , like how mother picked the splinter from their hand to the time they got married and how when she dies her "tiger" who were taught by her will go on living.