Good question. If the property being purchased is not a residence for the son or husband to reside in and subject to the purchase money anti-deficiency statutes in many states, there is the possibility that the community assets of the husband and wife could be responsible for any deficiency in the event that the purchased property is foreclosed upon where the foreclosed price is less than the loan owing on it.Under community property law, the wife could very well be subject to liabilty for this debt arising during her marriage to the husband in the event of a foreclosure. I suggest that a real estate attorney be consulted with at this time.