Computer Virus?

After writing the last post, I got a call from a friend who I didn't know had my number. Maybe she looked it up. However, the conversation struck me odd, and I try to listen to my gut. She said her computer caught a virus, so they now have all her email contacts. She gave me an email subject, so I'd know the email in question was from her and, therefore, safe to open. Something about the conversation, though, was weird; I don't know. Any comments?