My mom and I use Apple ID on our Apple phones. Sometimes I can see messages sent to my mom on my phone ... I can share my address book. ..

Apple's mobile phone is calculated by ID. If you and your mother both use the same ID, address book sharing is normal. If you want to cancel, the best way is to create your own ID, so that your mother's ID is different from yours. Because Apple says all its things are stored in the id. I used to have the same situation on the IPAD. After you create a new ID, it won't be like this.

Hope to adopt