I bet that in the position they were in, they got tired of being in that crouched position, I agree everyone is getting pretty off topic, if she did anything else it would stray from the point of Kovu being exiled. Making it so she wouldn't catch up to him, so they could make room for the dramatic love scene... I guess Disney wanted to do it that way. I think they just didn't pay attention to how smart us lion Kingers are