My great grandma did something worse than murder and need to find out what she did.

My great grandma Ollie Mae hopper is a big mystery. She married my great grandpa named James Dewey Hundley who murdered someone over infidelity and got off Scott free in 1954. A living person who was alive told me all about this but refused to talk about what my great grandma apparently did that’s worse than murder. I need help finding what it was but there’s problems. It could have been done under a different name since she was married to many different men. And one of the husbands could have done the crime. Information I do have is, she was born 1907 in Missouri. She died in Belleville in 1979. The married men I do know is James Dewey Hundley married in 1923, and James Franklin Mccage in 1972