Oddly enough .... there's a ladiesandtangents podcast story of 2 guys dating a year,(Note: A and B) and the parents knew of B and so did A's family after introducing B. But then they somehow (forgot why it happened exactly) but they did a DNA TEST (just remembered why lol, because B knew he was adopted and wanted to know who his parents were) some then, for some celebratory date, A got him a rest and then ran it, found out that they were blood brothers. A's parents claimed they knew he looked familiar but didn't put the pieces together, but just happy that A was happy... They both on good terms but no longer that way with each other....
Web comics is life~