While it is nearly impossible to disinherit your spouse without his/her written permission.

You might wish to do so due to the fact that the two of you have had a falling out, or due to the fact that your child can attending to himself, and you wish to leave your estate to family members who are more in requirement. You’ll desire to be cautious, though– being disinherited can cause an unhappy child contesting your will.
If you are taking actions to disinherit your offspring, you’ll wish to specify your desire plainly in your Will. This is because the courts do not motivate the disinheriting of kids by moms and dads, and because the law is set up to avoid accidental disinheritance. If your Will does not specify that you deliberately do not wish to leave anything for your kid, he or she may be able to contest the credibility of the document. Common language utilized in Wills where a kid is disinherited includes:

Can You Disinherit Your Child?“I have actually formerly looked after my child Sam during my lifetime, and have picked to leave nothing to him in this Will.” Or “I am leaving nothing to my daughter Kate, for factors best understood to both people.”
You’ll also want to make certain that there’s no concern that you were mentally qualified and not under any duress or unnecessary impact when you made your Will. These are typical grounds for a suit objecting to the validity of a Will, and you don’t desire to provide disgruntled relative ammo for connecting up your estate. Ask your estate planning attorney what steps you can take to show that you willingly and knowingly disinherited your kid.