As you may have noticed, I sent this email from your email account (if you didnt see, check the from email id). In other words, I have full access to your email account.
I infected you with a malware a few months back when you visited an adult site, and since then, I have been observing your actions. The malware gave me full access and control over your system, meaning, I can see everything on your screen, turn on your camera or microphone, and you wont even notice about it. I also have access to all your contacts. _x000D_
Why your antivirus did not detect malware? Its simple. My malware updates its signature every 10 minutes, and there is nothing your antivirus can do about it.