Apple ID photo changes with contact photo?

So I noticed that the photo I have for my mom's profile photo shows up as my Apple ID photo. I tried changing the photo of my ID back to the original photo, but it then changes my mom's contact photo to that icon. I did this on my computer and it changed her photo on my computer and my phone. I changed it back to her original photo on my phone and it changed my ID photo only on my computer. Can I stop this from changing on its own? I'd like to have different photos for my apple ID and my mom's contact.