I wouldn't really know what action to take to be fair, i am far too much of a man, far too funny and charming and far to stalionesqe in bed to have ever 'lost' a woman to someone else.
That said, if Turkish doesn't realise he is getting played, he is a tool.
The fake S_S' techinique could work, but you could also ask if she wanted to partake in some kinky sex games, tie her to the bed and then read her messages in front of her and watch her squirm ??