State verbs

[Nessie]

Hi, I know state verbs cannot be used with continuous tenses, but I remember hearing from someone that they can still be used with such tenses in case of emphasis
For example:
Sorry I can't talk with you. I am having to help the customers
=> Is that idea right or wrong? and if it is right, what does the speaker emphasize in this sentence when using present continuous:
Is your grandmother feeling better now?
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... something we never have again, I know... I guess I really really know..

Sorry seems to be the hardest word...