K D, The information on the ABNEYs was obtained from John Burke's "A Genealogical and Heraldic History of the Commoners of Great Britain and Ireland, Vol. I" unless otherwise noted.
As for Ellenor's age, nothing was said about her in Burke except for "daughter of John Wolseley."Another couple of researchers have apparently found Ellenor and George's final resting places in Willesley Chapel, England and on the grave marker it reads, "Here lieth the bodies of George Abney, Esquire and Ellene, his wife, sch George Deceased the first day of March in the year of our Lord God, 1578, and the said Ellene deceased the 3rd. day of December in the year of our Lord 1571."
I took the liberty of calculating Ellenor's age as to when she was old enough to conceive.She may have actually been younger.As for George, let's just suffice it to say it was not unusual in those days and times for a man to take a bride who was young enough to be his daughter or even granddaughter -- to bear children to carry on the family name.Please forgive me if this sounds crude, but it is scientifically proven a man can father children up until the day he dies (and now-a-days, even after his death).
I hope this helps a bit in answering the age question.It is difficult to understand the culture of that time period and I constantly have to remind myself that things were indeed, "different" during those times.