Where To Begin?

Yesterday the RA tried to steal some more money. I was pleased because it proved to his father beyond doubt that he is not to be trusted. We have been hiding money and credit cards for several months now but each time his father, after an initial shock and horror reaction, returns like a homing pigeon to his default position. 'He's a good boy at heart' 'He will come out of this phase' and the worst one 'You are making too much of it'

Background information

• I live in Catalunya with my Catalan partner
• His 15 year old son lives with us two weeks out of every four
• Last September we found out - from the bank statements - that he had used both our credit cards to play online poker
• He denied it vehenmently and said it must be a computer hacker.
• I lost 800 euros over a period of two weeks
• Since then there have been several instances of money going missing. 
• Finally he admitted - under pressure - that he took 60 euros from his fathers pocket. His reason? 'because you wouldn't give me my Christmas money'

Of course there are lots of other issues.  Things like homework, use of computer, rude and unhelpful attitude, refusal to shower or clean teeth, 24 hour connection to mobile phone running up large bills. These things are considered 'normal' I think for an adolescent. But the stealing and lying? It has moved us into another dimension.
I am new to stepmotherhood.  I have no other children and I am living in a different country trying to learn the language as well as the customs. None of it is easy and I am hoping that writing this blog will help keep me sane and stop me having to walk out and 'go home'.
I am often tempted to do it.
But I'll keep all this for another post.