It is interesting to me that Carolyn and Joe started out as boyfriend and girlfriend when DS began because....
[spoiler]Later on in the show, it was revealed that Joe and Chris/Amy are cousins, and Quentin is their great-grandfather. Quentin is Carolyn's great-uncle, so Joe and Carolyn are distant cousins!![/spoiler]
Evidently the Collinses don't mind being a very close family.
[spoiler]In 1968, Chris and Carolyn dated, and they're even more closely related than her and Joe.
Also, Laura is not only David's mother, but his great-grandmother![/spoiler]
Don't forget, Joshua tried to fix up Jeremiah with Cousin Millicent early in the 1795 storyline.
ProfStokes