Mutually stalking
When you and stalk someone and they stalk you at the same time. It is a mutual understanding that you both are doing this and can be done with or without acknowledgement
Friend: How do you know that person and why are you stalking them
Me: It is zebra, I have never had a conversation with them but we are mutually stalking each other
Me: It is zebra, I have never had a conversation with them but we are mutually stalking each other