回複：我想LZ是不放心另一半，怕房子到不了她女兒手中。而不是怕女兒不讓另一半住吧。

That is fine. That makes a joint tenancy a even more interesting choice than a will. A joint tenancy is a will substitute such that the property will distribute outside a will. Any distribution under real estate law or contract law, or even family law in community property states will take precedent on a will, which in turn takes precedent on intestacy. If she wants to draw a will, it would be almost for sure a reciprocal or mutual will and situations like lapse must be carefully considered. A will can be modified. A will can be revoked. A codicil may revoke the entire will. An attorney is a must. If not, there is a chance part of this property will land in the hands of her step sons.