Hi Zachary. I don't recall ever seeing an official policy on this, but you could only have one WikiTree account associated with an e-mail address. If they both want to be participants, with separate accounts, they would need to add another address. (They could each have their separate profiles without having separate accounts.) FWIW, I share e-mail with my wife too, but she is not a participant, so we have no conflict. If she ever decided to put up a little data of her own, she could get into my account, and the site would have no way of knowing whose fingers are on the keyboard. So the arrangement requires a little trust on my part.