Nothing. Step-children and step-parents have no legal relationship.
Another View: It is not disclosed whether the step-children were legally adopted by the parent, or not. If they were legally adopted, they would have as much (or as little) claim to the estate as a natural birth-child.
If a will exists and you were not specifically provided for in the will, you have no claim on the estate.
If the parent died intestate you must contact the Probate Court to protect any interest you believe you may have in the decedent's estate.
Consult with an attorney over your particular circumstance.
They can be sued.
No
Inheritance.
no
the animal will be confused as to where the parent is but over time will get used to not having a parent
Then the other parent has to take care of the nest.
Morally and ethically yes, but not legally.
That child's interest would pass to any living parent and if no parent to their siblings.
Yes, and very often to extremes.
If there is no will, the law normally splits the estate between the spouse and the natural children.
It so depends on whether the other parent is a spouse, and what her will says. Despite the enticement of having some of this yourself, the best thing to do is to look at what her wishes were and follow those.
Some institutes, if its a smaller loan will allow you to fax in a death ceterifercate.