My son separated from his wife 2 years ago. They lived in a rented house. They will start divorce proceedings very soon after the 2 year separation. I am about to buy my son a house from my retirement savings but I am worried about his wife making a claim on any of it when the separation goes through. What is the risk if it was not their married home, she never lived in it, and he doesn't even own it yet? Also, there will be a legal charge on the property to protect my investment in it.