How cam I converge an email attachment to a virus?

I think that my wife may be cheating on me at work. I want to send her an email. When she opens the email, I want my keystroke recognition software to download on her computer without her knowing. I also want it to send me daily reports on my email without her knowledge. I know this is possible because she did it earlier in our marriage and found me innocent. Can you please help me? Thanks!