Minutus

I'm jumping in late on this, but sulky teens or kids who don't want to communicate make me wonder: is the kid there because she wants to be or because mom/dad sees her as having a problem that needs to be fixed?
You may have to approach her in a very roundabout way, through her hobbies or activities, or through drawing. (If she were younger, I'd say through her play; but she's well past that stage.) If she can communicate non-verbally, you then have to explore why speech is so difficult for her.
Her avoiding eye contact and whispering her answers to her mom are also worth following further.
Peace,
Dale

Avoiding eye contact and whispering the answer to the mom -- isn't that a keynote of some common remedy? Was it calc-c, or silica maybe? (And I am *not* assuming that would be the needed remedy.)

Shannon

I thought looking? whispering to Mum to answer was a feature of Pulsatilla.
Ref Works also would suggest Baryta Sulph [ Lovely write up Links 1997 ]for no eye contact and Baryta might have this shyness and stubbornness.
Jean