They are brother and sister, you know

And not in a "Brady Bunch" kind of way either.

You know, they could have addressed this years ago when one of Sinead's girlfriends came over the house, Sinead could have said, "Have you ever met my cute brother, John? He figure-skates, you know. Have you ever skated?" Or vice versa. It would have solved the whole problem!

But no they didn't do that and now they have THIS going on.