I am not related but thought I'd see if I could help out. Am I on the right track?
Spouse 1:W V Nugent Spouse 2:E E McClure Marriage Date:20 Feb 1890 County:Knox Book:C-12 Original Source Page:363
Spouse 1:Wm V Nugent Spouse 2:Laberta Owens Marriage Date:04 Mar 1901 County:Knox Book:C-15 Original Source Page:408
Spouse 1:Wm V Nugent Spouse 2:Nancy J Owen Marriage Date:31 Mar 1910 County:Knox Book:C-21 Original Source Page:504 Date:11 Mar 1865(his birth date)
The 1910 census was indeed hard to read but if you look at the section where it says marriage it has m3 for William meaning he was married three times and I'm positive the wife's name begins with 'N' so it must be Nancy.So, it would seem that Laberta did indeed die before March 1910. Hope this helps!