my cousin and her boyfriend share an itunes account. they each have an iphone ,different numbers but same apple account. my cousin also has an ipad under the same account. when i try and send messages to my cousin using her email (which i thought goes directly to the ipad) it not only goes to the ipad but it goes to BOTH their phones as well. i thought emails are only for ipads? and phone numbers are only for iphones how do i set it so that messages sent to the ipad are only on the ipad? or is it just made so that any time you send a message to an email all associated idevices with the account receive the same message?