Is the wife always sole heir to an estate when there are children involved?

No, the wife is not always the sole heir to an estate when there are children involved. In many jurisdictions, the distribution of an estate depends on the laws of inheritance or the terms of a will. Typically, a surviving spouse and children may share the estate, with specific proportions determined by state laws or the deceased's wishes outlined in a will. It's essential to consult local laws or a legal expert for accurate guidance in specific cases.