夫妻共有的房子，一方去世，房子自动归还在世的配偶。你先生自己名下的其他财产，他女儿可以和你分。
美国那么多二婚的，没听说一方去世后，另一方要卖房来或是准备好现金来付去世一方婚前子女那份遗产。
以下是我从网上节选的，那个例子和你的一样。
The Spouse’s Share in Oregon
In Oregon, if you are married and you die without a will, what your spouse gets depends on whether or not you have living descendants -- children, grandchildren, or great-grandchildren. If you don’t, or if all of your descendants are also descendants of your spouse, then your spouse inherits all of your intestate property.
If, however, you die with at least one descendant who is not the descendant of your surviving spouse, then your spouse inherits only 1/2 of your intestate property.
Example: Barrett is married to Jed and also has a 12-year-old daughter from a previous marriage. Barrett owns a house in joint tenancy with Jed, plus $200,000 worth of additional, separate property that would have passed under a will if Barrett had made one. When Barrett dies, Jed inherits the house outright -- it’s not intestate property -- plus $100,000 worth of Barrett’s property. Barrett’s daughter inherits the remaining $100,000 share of Barrett’s property.
例子：Barrett 和 Jed 结婚 并有一个12岁的，上次婚姻中的女儿。 他们共有一个房子。 他自己还有一个价值20万的另一个房子，如果Barrett有遗嘱的话是会分配一下这个房子的。 当Barrett死后，Jed 拥有了他们曾共有的房子－－这房子不是遗产－－加上10万Barrett自己持有的房子的一半。 Barrett 的女儿继承剩下的10万Barrett自己持有的房子。
这儿是网站地址：
http://www.nolo.com/legal-encyclopedia/intestate-succession-oregon.html
你让他女儿查一下 “Intestate Succession in Oregon”
