I can't explain the marriage indexes, but I found a snippet of an obituary for one of the sons of Walter F Adley Sr and Mary (Molloy) Manfra. In 1990, his parents were still alive as well as his stepmother Catherine (Emmert) Adley.
I found the "snippet" trying an internet search with:
"walter f adley" "south boston"
Update: Catherine passed away in 1992