Steve-O no mo!

For months now Becca has called Steven, Steve-O. I think she thought she was saying Steven, but it just came out differently. I sometimes call him Steve-O and he always corrects me. It's okay for Becca but not for anyone else.
Today, Becca said Steven - clear as day. I had noticed it a couple times and then Steven noticed it too. He was so excited that he doesn't have to be Steve-O anymore. Papa calls him Stev-a-rino -which again - he only likes it if Papa calls him that. Considering Steven wants to be a "Sportman" when he grows up, his dad and I keep telling him he better pick a nickname!