So they aren't actually my devices, they're my mothers. Shes not very tech savvy so she asked for my help. She has an Iphone 5 and a Samsung galaxy tablet (I think its the tab 3, she thinks its one of the notes) and she called me in shortly after I texted her to show that her tablet was receiving the texts that were being sent to her Iphone as they are received by the phone. The tablet has no SIM card inserted into it at all, but it can send and receive messages through the messaging app as if it were her phone and I receive them on my phone as if they had come from her phone. The two devices arent connected by Bluetooth but they are connected to the same WiFi network. I wouldn't be so confused if they were both apple devices or both android, but being an apple phone and an android tablet I have no idea how this happened or whats going on.