It depends on how close of a blood relative. If it happened to be a 4th or 5th cousin, no issue. I agree, first cousins are WAY too close -- my husband was raised with his second cousin, and now she's his niece too because his brother married her mom (who had adopted him, so...). They moved to Georgia so it was legal, and it's legal in a few other states too. Too close for me, thanks.