Quick backstory - DSS (8) has been referred for counselling and possible onward referral to CAMHS for stress and anxiety causing physical symptoms of diarrhoea, and involuntary twitches/ticks. His first session is next week while DSS is with us.
DP discovered today that DSS mum has told him that she doesn't agree with the Dr, that seeing a counsellor is unnecessary and that the repeated bouts of diarroeah he suffers are caused by eating too much cake mix 
DSS has seen the counsellor before and wants to go again, but won't tell his mum that because he says that she will get cross and shout at him which makes him cry.
So now what can DP do? 
Has told