The only way is to have the name solely in your wife's name. However this cannot be done if you are taking a mtge out in both names. If this is not possible the law states that the children have one year from the date of your death to come forth and declare their share, after which, they lose the right. You can try to have a legal document drawn up ( will) in the UK or where ever it is that you were married leaving the property to her and hope the kids never find out that they have the possibility, or just have them sign an agreement that they forfeit their rights to the property... however, they will still have that year option to change their minds. Then again the laws may change by then, never know in Italy.