Adding sources will help you clarify things. That death record would be a great start.
Update: I added the probate and other records, but the death record would be a very good one to add, and created a short stub of a biography with inline citations to demonstrate how they look.
The fact that the probate record has a line for other spouses, including dead ones, and it i blank.
I didn't look at the actual records for the children; that may give mother's name.