A breathy idiot on helium

Now Walter, looking like Junia, glared daggers at him.
"Sweety? Did you just call me sweety!? Gosh damn Christian! I am neither your girlfriend nor your bimbo!" she fumed, still sounding like a middle-aged man.
"But fine, here! Let me demonstrate you some of the device capabilities!" she said as she pulled it out from its hiding place, changed some settings and pressed a button on it!

"There, that better now?" it came from her in a high pitched and breathy voice that sounded sexy, but simply couldn't be taken seriously.

"Oh my! Walter, now you not only look like a bimbo, you also sound like a breathy idiot on helium as well!" Christian brought out giggling.

On this, Walter just rolled her eyes.