My iPad is connected to my iPhone?

My little sister has the iPad and my phone accidentally got connected to it and started going through my sh*t. If I delete it off of my phone will it delete off the iPad too?

Connected via Bluetooth or Wi-Fi? If you delete it off either one it shouldn't allow access to your iPhone. Also make sure it's not Bluetooth because if you have it on, and your sister scans for nearby devices and your iPhone pops out it could be that your phone allowed connection and are sharing files.