Aw honey (((hugs)), what an utter twunt he is.
But please don't panic as all he's doing is acting true to form.
He's terrified of you. Not because he fears that you will be violent towards him or the ow, but because he knows that you can cut through the crap he's told her which has, as I predicted back on page 3, taken the form of him claiming that he's been trying to break free of you for years.
I suspect that he's done such a good number on the ow that she's been trembling in her shoes expecting you to turn up with a hatchet at any moment. The poor thing has most probably been scared to go out without an escort and has been jumping out of her skin at the sound of any unexpected or sudden noise.
As almost a week's gone by without a peep out of you she may have begun to express some doubt that you're as obsessed/deranged/insane as he's claimed or, more likely, has become even more unnerved by the continual horror stories he's been feeding her to maintain the illusion that he's an honourable man and demanded that he take steps to protect the pair of them from your murderous intent.
Hence his report to the police and their visit to you - an exercise which has done him no good at all but which indicates the lengths he's prepared to go to in order to blacken your name and convince the ow that he's been your victim, rather than you having been conned by his duplicity.
I love that karma is already on the case and that your cousin's fortuitous encounter with the happy pair enabled her to lay the groundwork for his eventual denouement.
Of course the ow sided with him; that's only to be expected given that she was caught on the hop and it brings a smile to my face to imagine the heated conversation that took place after they returned to Villa Mortgage. I somehow doubt that he's quite such a happy bunny today as he's been while busily engaged in bigging himself up at your expense.
Everything comes to those that wait, honey. And you can afford to wait until he least expects it before delivering a cool, calm, and entirely factual account of his relationship with you to the ow.
Karma in the form of your cousin ensured that he had some explaining to do to the ow last night and karma will help us ensure that his extensive lies are revealed for all to see.
Btw, don't waste valuable time trying to attach any labels to him that suggest he has some condition over which he has no control as the only ailment he's suffering from is twuntisim, and he knows full well what he is doing at all times.