To tell, or not to tell

[Phoenix]

My ancestor, Mary Tuck, was the daughter of William Tuck and Margaret Copeman bp 1696 in Sharrington, Norfolk

She married William Bangay in Stody in 1719.

They had two children, then William died in 1722.

Mary remarried. I know this as she and her daughter by her second marriage, Margaret Davy, are both mentioned in William Tuck's will.

I and my cousin have DNA matches with both Bangay and Davy descendants. None of their trees link up, because Margaret's baptism has not been spotted by the Davy descendants and Mary's second marriage is not online.

As anyone who has had the joy of using the original records knows, there are masses of Norfolk records missing from the online data, particularly pre about 1740, when the ATs are still very patchy.

Do I contact everyone? Do I sneak the info onto my own tree and see if anyone finds it? Would they believe it?