My wife inherited her grandfather’s property. We have two children. Will they inherit a share of this property? Can she sell it without their permission? If so, how can they claim their share?

Yes, your children will inherit a share of the property as your wife’s legal heirs. She cannot sell it without their consent if they are above 18 years old. If the children are minors, your wife can sell the property with permission from the court or a guardian. They can claim their share through a legal suit, seeking partition of the property.