Hi Morgana.
I did the math and it appears that Tad Cummins married his wife when he was 19. The wife does appear younger than him - so she may have only been 16 or 17.
http://wavy.com/2017/04/21/tad-cummins-told-wife-he-needed-to-go-to-va-beach-or-d-c-area/
The teacher’s wife of 31 years has filed for divorce. Court records show that Jill Cummins sued her then-missing husband on the grounds of irreconcilable differences and inappropriate marital conduct.
31 years ago it was still common for marriages like this to occur. It was frown upon in the 80’s but it happened. Plus he was 19 when she was 16 or 17 not like he was 50. Can’t rightly say when these type of marriages stopped happening guess when people just started living together.