Pet attacks?

Our first dog which we named Jedi is a ferocious female. She likes my wife and maybe she feels that my wife loves her more than me. In one incident, I was checking the rashes on her tummy when my wife came around. When Jedi saw my wife, she bit me without warning. Her teeth sank on my right arm. I pounded her head to make her release her bite. And when she did, she bit my left arm. It took awhile before I was able to get my left hand free. After I went to the hospital for the needed shots, it seemed to Jedi that nothing happened between us. She's still that nice dog.

PS. Jedi lived to be 10 years old before succumbing to renal failure.