十年前我兒子結婚我買了一層樓給他，和令一層物業都是和他聯命共兩層，是長命契，已供斷，但他最近他和老婆好像會離婚，請問他們離婚後，兩層樓我兒子2份1的業權是否會和他老婆瓜分呢？

Potentially possible.

Division of property is always a complicated topic. In short - the court uses the approach of contribution (i.e. how much paid) to determine if a person is entitled for the ownership, rather than simply being named as a owner.

If the wife is able to prove that her income has contributed to the mortgage in anyway, then the wife will be entitled for some portions of the property based on how much she has contributed. At the same time, if you are only a named owner only (i.e. you paid nothing for the property), your entitlement of the property will be none.