My wife has a wifi-only iPad. She'd like to be able to send and receive texts from it, but it has no phone number, and she has no other Apple device to send/receive texts through. She's configured iMessage to know her email address and she's logged in to Apple using her Apple ID, but texting from my iPhone to her email address (using iMessage) results in the message showing up in her email, not in iMessage.
Is there a way to configure things so that she can send and receive texts on the iPad, even though there's no phone number for it? I already have iMessage on the iPad set up to send and receive messages at her email address, but that doesn't seem to be enough.