If the will says, in effect, "I give my house to my son for life and then to his children." then you have a legal life estate, and your children own the remainder interest. If it says, in effect, "I leave my house in trust, income and use to be for my son for life, and upon his death the remainder of the trust estate shall be distributed to my children," then it is in trust. Either way, the court is going to require that your children be given notice. If your sister tells your children that they are not entitled to anything, she may be disciplined and may be sued. If you want to leave your wife the house, then you can buy the remainder interest. Other methods also are possible.
Answered on Feb 25th, 2013 at 12:32 PM