After 11 years in prison my ex helped me to start a company.?

She put the company in her name with the verbal agreement that it would be transfered into my name as soon as i got everything straight w/ uncle sam. I recently started seeing another woman and my ex has failed to follow through with our agreement. in fact she has taken everything - money - proprty- now she wonts my home. I am not the only one she has played out like this infact she was living w/ another man who i have just found out owns some of the property that she says i owe her for. I have been told because her name is on my house that she is intitled to 1/2 even though i have made all the payments and she never even lived at the residence. help me keep my house.