iPad 2(non-3G) keeps ringing with disabled Facetime

Hey guys,

so issue is that after disabling Facetime on our iPad 2 (non-3G one), every time wife gets a call when she's home iPad rings, and it's a bit annoying.

All of the tips and guides on the web that I've found are more directed to 3G version of iPad 2, stating that you need to disable data cellular , but we don't even have this option.

Tried resetting and turning off/on, didn't help.

Help appreciated!