Kevin, I am sure you are correct, but I haven't found any record that specifically states "Abigail Hough died in child bed 3 Jan. 1725 [n.s.] at Kensington, CT."I spent yesterday with some Barbour books, and don't believe there is a Barbour record for the death of Abigail Hough Gridley in Farmington.
The record of her marriage to Samuel Gridley is, verbatim from Barbour:"Samuel (Gridley), s. Thomas, m. Abigail Hough, b. of Farmington, Aug. 23, 1723"citing LR2, pg 60.
The record of the the birth of the first child is: "Samuel (Gridley), s. Samuell (s. of Thomas), b. Dec. 20, 1724"citing LR2, pg 46.
The record of a marriage of a Samuel Gridley to a Chamberlin is "Samuel (Gridley), of Kensington, m.  Chamberlin, of Lebanon, Dec. 12, 1727"citing LR 4, pg 423.
Since the Farmington town clerk knew there were several Samuel Gridleys, he made sure to specify the one who was the son of Thomas in the first two records, but not in the third, and in the third record, the Samuel was in a different town or village (Kensington vs. Farmington).These three records do not "prove" to me anyway that the Samuel in the third record is the same as the Samuel in the first 2.As I said, I am sure you are correct, but when I see Abigail's father specified as the Ebenezer Hough that was born 2 years after Abigail and Samuel Gridley were married, I tend to question the accuracy of the whole document in which it appears.
I would really appreciate it if you can provide a reference for the statement you gave in your reply (Abigail dying in child bed.) I will look myself at the original Farmington Congregational Church records, I happen to have them on loan from the FHL right now, but I don't think there is such an entry in the town records.