Hello thornwivans,
Let's tap on the user profile at the top of Settings on his iPad to make sure it is showing his email address as opposed to yours. That will help us verify that you aren't unintentionally signed into his iPad with your Apple ID account.
If his details are showing in Settings, does that persist after restarting both devices?
Restart your iPhone - Apple Support
Restart your iPad - Apple Support
"How to restart an iPad without a Home button
- Press and hold either volume button and the top button until the power off slider appears.
- Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
- To turn your device back on, press and hold the top button until you see the Apple logo.
How to restart an iPad with a Home button
- Press and hold the top button until the power off slider appears.
- Drag the slider, then wait for 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
- To turn your device back on, press and hold the top button until you see the Apple logo."
A restart can sometimes help address odd behaviors.
Let us know your results, and we'll keep moving forward from there.
Cheers!