Hi lordabanks and welcome to the forum
It is in no way certain that you have a 50% beneficial interest in your wife's property- this could only be calculated by working out what you had paid towards the property since you started living there.
You are better off seeking specific legal advice on this point before proceeding. If you do then decided to propose an IVA, your IP can specifically refer to this within the proposal. Have you consulted an IP to act for you yet?
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
See customer feedback at:
http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp