Divorce Claim while living with my family

I am a man who had an arranged marriage 2 years ago with a girl also from the UK. I don't love her so am desperate for a divorce. We split 4 months ago as she left my family home as we both agreed we do not want to be with each other anymore. She now wishes to claim £17000 from me and also wants back jewellery that she has given me. I would like some personal possessions back from her as well. Can she claim £17,000 back from me? She has lived in my house rent free as the mortgage had been paid. She only paid a few of the bills, as my mum and dad and myself paid the others. The house and everything else is in my parent's name. We also don't have any children. I have put my petition in last week. Her relatives have also used threatening behaviour towards me and my family. Can you tell me how it works and whether she can claim for anything?