My parent's are separated and will not be getting a divorce however want to make sure their wills leave everything to my brother and I. They basically want to put something in regarding their wishes that any de facto (who may already or not already be in the picture) doesn't claim against their estates. If we are clear in stating why any de factos have no claim, will this help? Also they are going to name my brother and I as executors for each of them. This means that we can't sign the wills as witnesses right? Or am I getting mixed up with another states legislation?