Saudi Electronic University Managing up And Across Discussion

I’m working on a management discussion question and need an explanation and answer to help me learn.

This is the topic of discussion,

As an operations professional, you need to be able to
interact efectively with many internal customers – from
corporate managers to feld representatives. One of your
peers is Jessica, who is a talented operations professional,
but who is downright rude to her internal customers. Her
attitude is so bad that people around your company ask
specifcally to deal with you instead of Jessica. You’ve
heard many tales about her sarcasm and her unwillingness
to deliver anything other than the absolute minimum to
other employees. You’ve thought about talking to Bruce,
the manager to whom both you and Jessica report – but
you and everyone else knows that they’re dating. In the
meantime, your workload is increasing because of Jessica’s
reputation. How do you handle Jessica and Bruce?