IPhone problem? My messages come back to me?

My mom and I also share a plan. Ever since I updated my iPhone software to the latest one, all the messages I send to my mom get sent back to me from my own number. I can still text my friends without a problem, but the thing is I'm also getting my mom's messages from people I don't know, and the messages my mom sent appear as messages that I sent, and it's messing everything up so much. What happened?

Hi
Seems there is a problem with your mobile service contact your service provider to tell him/her your problem. I hope that helps

It has also happened with my son whom is on his mothers account. When you set up the new OS it has prob your number and your mom's number, I think if you uncheck all except yours it would clear it up.