player calls her own violation

[Nevadaref]

I worked a game today which involved a first year program. They are one of the worst varsity girls teams in the state skillwise, but are nice people.
Here's the play:
I am at the trail position. A girl is dribbling near half court with her defender playing well off near the top of the key. I look away from the dribbler to watch the screens being set at the free throw line extended on my side. I probably only looked away for one second, but when I turned my head back to the dribbler, she was holding the ball in her outstretched hand and while taking a couple of steps toward me, to hand me the ball, she says, "I double dribbled." I almost lost it.

They were losing by 30 and I was probably the only one in the building that didn't see it, but what could I do? I smiled, said "OK," blew the whistle, gave the double dribble signal, and we went the other way.