If I send my mum an iMessage it goes through to her boyfriends phone? If I send my mum a text message it goes through to her phone number, but today I sent her an iMessage and it went through to her boyfriend do phone instead. Why is this?
It's possible that at some point she has signed in to her iCloud account on his iPhone and activated iMessage thus when she receives an iMessage it is also being sent to his iPhone.