Messages

My wife on same account doesn’t get the normal messages ( her iMessage is turned off just to don’t see my work messages I’m getting )

when I send messages to her it comes in blue as iMessage on my phone and comes as delivered straight away but in real she don’t get them.

I need iMessages to be on on my iPhone for work.

If I turn iMessages off she is receiving my messages

how can I send normal messages without turning iMessage off on my iPhone?